// === CHINESE LONG STORY ===
// Complete Chinese story with English translation and pinyin pronunciation

window.ContentModules = window.ContentModules || {};

window.ContentModules.ChineseLongStory = {
    name: "The Dragon's Pearl - 龙珠传说",
    description: "Long story with translation and pronunciation",
    difficulty: "intermediate",
    language: "zh-CN",
    totalWords: 1200,

    // === GRAMMAR LESSONS SYSTEM ===
    grammar: {
        "chinese-particles": {
            title: "Chinese Grammar Particles - 语法助词",
            explanation: "Chinese particles are essential grammatical markers that show relationships between words and add meaning to sentences.",
            rules: [
                "的 (de) - Possessive marker and adjective connector",
                "在 (zài) - Location and time marker 'at/in/on'",
                "里 (lǐ) - Inside/within location marker",
                "中 (zhōng) - In/among/middle position marker"
            ],
            examples: [
                {
                    chinese: "老人的故事",
                    english: "the old man's story",
                    explanation: "的 shows possession - 'old man's'",
                    pronunciation: "lǎo rén de gù shì"
                },
                {
                    chinese: "在山里",
                    english: "in the mountains",
                    explanation: "在...里 shows location 'in/inside'",
                    pronunciation: "zài shān lǐ"
                },
                {
                    chinese: "村庄中的龙",
                    english: "the dragon in the village",
                    explanation: "中 shows position 'in/among'",
                    pronunciation: "cūn zhuāng zhōng de lóng"
                }
            ],
            exercises: [
                {
                    type: "fill_blank",
                    sentence: "这是小明___书包",
                    options: ["的", "在", "里", "中"],
                    correct: "的",
                    explanation: "Use 的 for possession - 'Xiaoming's backpack'"
                },
                {
                    type: "translation",
                    chinese: "龙在水里",
                    english: "The dragon is in the water",
                    focus: "Location marker 在...里"
                }
            ]
        },

        "chinese-word-order": {
            title: "Chinese Word Order - 中文语序",
            explanation: "Chinese follows Subject-Verb-Object order like English, but with important differences for time, place, and manner.",
            rules: [
                "Basic pattern: Subject + Time + Place + Verb + Object",
                "Time comes before place: '昨天在家' (yesterday at home)",
                "Manner often comes before verb: '慢慢地走' (slowly walk)",
                "Place words use specific markers: 在 (at), 里 (in), 上 (on)"
            ],
            examples: [
                {
                    chinese: "老人昨天在村庄里讲故事",
                    english: "The old man told stories in the village yesterday",
                    breakdown: "老人(S) + 昨天(Time) + 在村庄里(Place) + 讲(V) + 故事(O)",
                    pronunciation: "lǎo rén zuó tiān zài cūn zhuāng lǐ jiǎng gù shì"
                },
                {
                    chinese: "龙慢慢地飞向山顶",
                    english: "The dragon slowly flew toward the mountain peak",
                    breakdown: "龙(S) + 慢慢地(Manner) + 飞向(V) + 山顶(O)",
                    pronunciation: "lóng màn màn de fēi xiàng shān dǐng"
                }
            ],
            exercises: [
                {
                    type: "word_order",
                    scrambled: ["在", "昨天", "老人", "家里", "休息"],
                    correct: ["老人", "昨天", "在", "家里", "休息"],
                    english: "The old man rested at home yesterday"
                }
            ]
        },

        "measure-words": {
            title: "Chinese Measure Words - 量词",
            explanation: "Chinese uses specific measure words (classifiers) between numbers and nouns, similar to 'a piece of paper' in English.",
            rules: [
                "Pattern: Number + Measure Word + Noun",
                "个 (gè) - Most common, used for people and general objects",
                "条 (tiáo) - For long, thin things like dragons, rivers, roads",
                "座 (zuò) - For mountains, buildings, bridges",
                "本 (běn) - For books, magazines"
            ],
            examples: [
                {
                    chinese: "一条龙",
                    english: "one dragon",
                    explanation: "条 is used for long creatures like dragons",
                    pronunciation: "yì tiáo lóng"
                },
                {
                    chinese: "三座山",
                    english: "three mountains",
                    explanation: "座 is used for large structures like mountains",
                    pronunciation: "sān zuò shān"
                },
                {
                    chinese: "两个老人",
                    english: "two old people",
                    explanation: "个 is the general classifier for people",
                    pronunciation: "liǎng gè lǎo rén"
                }
            ],
            exercises: [
                {
                    type: "classifier_choice",
                    chinese: "五___珠子",
                    options: ["个", "条", "座", "本"],
                    correct: "个",
                    explanation: "珠子 (pearls) use 个 as the general classifier"
                }
            ]
        },

        "chinese-tones": {
            title: "Chinese Tones - 声调",
            explanation: "Mandarin Chinese has 4 main tones that change word meaning. Tone is crucial for communication.",
            rules: [
                "First tone (ā) - High, flat tone",
                "Second tone (á) - Rising tone, like asking a question",
                "Third tone (ǎ) - Falling then rising, dip tone",
                "Fourth tone (à) - Sharp falling tone",
                "Neutral tone (a) - Light, quick, no specific pitch"
            ],
            examples: [
                {
                    chinese: "妈 (mā) - mother",
                    tone: "First tone - high and flat",
                    pronunciation: "mā"
                },
                {
                    chinese: "麻 (má) - hemp/numb",
                    tone: "Second tone - rising",
                    pronunciation: "má"
                },
                {
                    chinese: "马 (mǎ) - horse",
                    tone: "Third tone - dip",
                    pronunciation: "mǎ"
                },
                {
                    chinese: "骂 (mà) - to scold",
                    tone: "Fourth tone - falling",
                    pronunciation: "mà"
                }
            ],
            exercises: [
                {
                    type: "tone_identification",
                    word: "山",
                    pronunciation: "shān",
                    tone_options: ["First", "Second", "Third", "Fourth"],
                    correct: "First",
                    explanation: "山 (shān) uses first tone - high and flat"
                }
            ]
        }
    },

    vocabulary: {
        "龙": {
            "user_language": "dragon",
            "type": "noun",
            "pronunciation": "lóng"
        },
        "珠": {
            "user_language": "pearl",
            "type": "noun",
            "pronunciation": "zhū"
        },
        "传说": {
            "user_language": "legend",
            "type": "noun",
            "pronunciation": "chuán shuō"
        },
        "故事": {
            "user_language": "story",
            "type": "noun",
            "pronunciation": "gù shì"
        },
        "山": {
            "user_language": "mountain",
            "type": "noun",
            "pronunciation": "shān"
        },
        "水": {
            "user_language": "water",
            "type": "noun",
            "pronunciation": "shuǐ"
        },
        "村庄": {
            "user_language": "village",
            "type": "noun",
            "pronunciation": "cūn zhuāng"
        },
        "老人": {
            "user_language": "old man",
            "type": "noun",
            "pronunciation": "lǎo rén"
        },
        "年轻": {
            "user_language": "young",
            "type": "adjective",
            "pronunciation": "nián qīng"
        },
        "美丽": {
            "user_language": "beautiful",
            "type": "adjective",
            "pronunciation": "měi lì"
        }
    },

    story: {
        title: "The Dragon's Pearl - 龙珠传说",
        totalSentences: 150,
        chapters: [
            {
                title: "第一章：古老的传说 (Chapter 1: The Ancient Legend)",
                sentences: [
                    {
                        id: 1,
                        original: "很久很久以前，在中国的一个偏远山村里，住着一个年轻的渔夫叫李明。",
                        translation: "Long, long ago, in a remote mountain village in China, there lived a young fisherman named Li Ming.",
                        words: [
                            {word: "很久", translation: "long", type: "adverb", pronunciation: "hěn jiǔ"},
                            {word: "很久", translation: "long", type: "adverb", pronunciation: "hěn jiǔ"},
                            {word: "以前", translation: "ago", type: "noun", pronunciation: "yǐ qián"},
                            {word: "在", translation: "in", type: "preposition", pronunciation: "zài"},
                            {word: "中国", translation: "China", type: "noun", pronunciation: "zhōng guó"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "一个", translation: "a", type: "number", pronunciation: "yī gè"},
                            {word: "偏远", translation: "remote", type: "adjective", pronunciation: "piān yuǎn"},
                            {word: "山村", translation: "mountain village", type: "noun", pronunciation: "shān cūn"},
                            {word: "里", translation: "in", type: "preposition", pronunciation: "lǐ"},
                            {word: "住着", translation: "lived", type: "verb", pronunciation: "zhù zhe"},
                            {word: "一个", translation: "a", type: "number", pronunciation: "yī gè"},
                            {word: "年轻", translation: "young", type: "adjective", pronunciation: "nián qīng"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "渔夫", translation: "fisherman", type: "noun", pronunciation: "yú fū"},
                            {word: "叫", translation: "named", type: "verb", pronunciation: "jiào"},
                            {word: "李明", translation: "Li Ming", type: "noun", pronunciation: "lǐ míng"}
                        ]
                    },
                    {
                        id: 2,
                        original: "李明每天都在附近的河里打鱼，生活虽然简单，但他很满足。",
                        translation: "Li Ming fished in the nearby river every day, and although his life was simple, he was very content.",
                        words: [
                            {word: "李明", translation: "Li Ming", type: "noun", pronunciation: "lǐ míng"},
                            {word: "每天", translation: "every day", type: "adverb", pronunciation: "měi tiān"},
                            {word: "都", translation: "all", type: "adverb", pronunciation: "dōu"},
                            {word: "在", translation: "in", type: "preposition", pronunciation: "zài"},
                            {word: "附近", translation: "nearby", type: "adjective", pronunciation: "fù jìn"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "河里", translation: "river", type: "noun", pronunciation: "hé lǐ"},
                            {word: "打鱼", translation: "fish", type: "verb", pronunciation: "dǎ yú"},
                            {word: "生活", translation: "life", type: "noun", pronunciation: "shēng huó"},
                            {word: "虽然", translation: "although", type: "conjunction", pronunciation: "suī rán"},
                            {word: "简单", translation: "simple", type: "adjective", pronunciation: "jiǎn dān"},
                            {word: "但", translation: "but", type: "conjunction", pronunciation: "dàn"},
                            {word: "他", translation: "he", type: "pronoun", pronunciation: "tā"},
                            {word: "很", translation: "very", type: "adverb", pronunciation: "hěn"},
                            {word: "满足", translation: "content", type: "adjective", pronunciation: "mǎn zú"}
                        ]
                    },
                    {
                        id: 3,
                        original: "村里的老人们经常讲述一个关于神奇龙珠的古老传说。",
                        translation: "The elderly people in the village often told an ancient legend about a magical dragon pearl.",
                        words: [
                            {word: "村里", translation: "village", type: "noun", pronunciation: "cūn lǐ"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "老人们", translation: "elderly people", type: "noun", pronunciation: "lǎo rén men"},
                            {word: "经常", translation: "often", type: "adverb", pronunciation: "jīng cháng"},
                            {word: "讲述", translation: "tell", type: "verb", pronunciation: "jiǎng shù"},
                            {word: "一个", translation: "a", type: "number", pronunciation: "yī gè"},
                            {word: "关于", translation: "about", type: "preposition", pronunciation: "guān yú"},
                            {word: "神奇", translation: "magical", type: "adjective", pronunciation: "shén qí"},
                            {word: "龙珠", translation: "dragon pearl", type: "noun", pronunciation: "lóng zhū"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "古老", translation: "ancient", type: "adjective", pronunciation: "gǔ lǎo"},
                            {word: "传说", translation: "legend", type: "noun", pronunciation: "chuán shuō"}
                        ]
                    },
                    {
                        id: 4,
                        original: "传说中说，龙珠藏在深山的秘密洞穴里，能够实现持有者的任何愿望。",
                        translation: "The legend said that the dragon pearl was hidden in a secret cave in the deep mountains and could fulfill any wish of its holder.",
                        words: [
                            {word: "传说", translation: "legend", type: "noun", pronunciation: "chuán shuō"},
                            {word: "中", translation: "in", type: "preposition", pronunciation: "zhōng"},
                            {word: "说", translation: "said", type: "verb", pronunciation: "shuō"},
                            {word: "龙珠", translation: "dragon pearl", type: "noun", pronunciation: "lóng zhū"},
                            {word: "藏在", translation: "hidden in", type: "verb", pronunciation: "cáng zài"},
                            {word: "深山", translation: "deep mountains", type: "noun", pronunciation: "shēn shān"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "秘密", translation: "secret", type: "adjective", pronunciation: "mì mì"},
                            {word: "洞穴", translation: "cave", type: "noun", pronunciation: "dòng xué"},
                            {word: "里", translation: "in", type: "preposition", pronunciation: "lǐ"},
                            {word: "能够", translation: "could", type: "verb", pronunciation: "néng gòu"},
                            {word: "实现", translation: "fulfill", type: "verb", pronunciation: "shí xiàn"},
                            {word: "持有者", translation: "holder", type: "noun", pronunciation: "chí yǒu zhě"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "任何", translation: "any", type: "adjective", pronunciation: "rèn hé"},
                            {word: "愿望", translation: "wish", type: "noun", pronunciation: "yuàn wàng"}
                        ]
                    },
                    {
                        id: 5,
                        original: "但是，想要找到龙珠并不容易，因为山中充满了危险。",
                        translation: "However, finding the dragon pearl was not easy, because the mountains were full of danger.",
                        words: [
                            {word: "但是", translation: "however", type: "conjunction", pronunciation: "dàn shì"},
                            {word: "想要", translation: "want to", type: "verb", pronunciation: "xiǎng yào"},
                            {word: "找到", translation: "find", type: "verb", pronunciation: "zhǎo dào"},
                            {word: "龙珠", translation: "dragon pearl", type: "noun", pronunciation: "lóng zhū"},
                            {word: "并不", translation: "not", type: "adverb", pronunciation: "bìng bù"},
                            {word: "容易", translation: "easy", type: "adjective", pronunciation: "róng yì"},
                            {word: "因为", translation: "because", type: "conjunction", pronunciation: "yīn wèi"},
                            {word: "山中", translation: "mountains", type: "noun", pronunciation: "shān zhōng"},
                            {word: "充满了", translation: "full of", type: "verb", pronunciation: "chōng mǎn le"},
                            {word: "危险", translation: "danger", type: "noun", pronunciation: "wēi xiǎn"}
                        ]
                    }
                ]
            },
            {
                title: "第二章：神秘的梦境 (Chapter 2: The Mysterious Dream)",
                sentences: [
                    {
                        id: 6,
                        original: "一天晚上，李明做了一个奇怪的梦。",
                        translation: "One night, Li Ming had a strange dream.",
                        words: [
                            {word: "一天", translation: "one day", type: "noun", pronunciation: "yī tiān"},
                            {word: "晚上", translation: "night", type: "noun", pronunciation: "wǎn shàng"},
                            {word: "李明", translation: "Li Ming", type: "noun", pronunciation: "lǐ míng"},
                            {word: "做了", translation: "had", type: "verb", pronunciation: "zuò le"},
                            {word: "一个", translation: "a", type: "number", pronunciation: "yī gè"},
                            {word: "奇怪", translation: "strange", type: "adjective", pronunciation: "qí guài"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "梦", translation: "dream", type: "noun", pronunciation: "mèng"}
                        ]
                    },
                    {
                        id: 7,
                        original: "梦中，一条巨大的金龙出现在他面前，龙的眼睛像星星一样闪闪发光。",
                        translation: "In the dream, a huge golden dragon appeared before him, its eyes sparkling like stars.",
                        words: [
                            {word: "梦中", translation: "in dream", type: "noun", pronunciation: "mèng zhōng"},
                            {word: "一条", translation: "a", type: "number", pronunciation: "yī tiáo"},
                            {word: "巨大", translation: "huge", type: "adjective", pronunciation: "jù dà"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "金龙", translation: "golden dragon", type: "noun", pronunciation: "jīn lóng"},
                            {word: "出现", translation: "appeared", type: "verb", pronunciation: "chū xiàn"},
                            {word: "在", translation: "at", type: "preposition", pronunciation: "zài"},
                            {word: "他", translation: "him", type: "pronoun", pronunciation: "tā"},
                            {word: "面前", translation: "before", type: "noun", pronunciation: "miàn qián"},
                            {word: "龙", translation: "dragon", type: "noun", pronunciation: "lóng"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "眼睛", translation: "eyes", type: "noun", pronunciation: "yǎn jīng"},
                            {word: "像", translation: "like", type: "verb", pronunciation: "xiàng"},
                            {word: "星星", translation: "stars", type: "noun", pronunciation: "xīng xīng"},
                            {word: "一样", translation: "same as", type: "adverb", pronunciation: "yī yàng"},
                            {word: "闪闪发光", translation: "sparkling", type: "verb", pronunciation: "shǎn shǎn fā guāng"}
                        ]
                    },
                    {
                        id: 8,
                        original: "金龙对李明说：'勇敢的年轻人，你有纯洁的心，我要给你一个机会。'",
                        translation: "The golden dragon said to Li Ming: 'Brave young man, you have a pure heart, I want to give you a chance.'",
                        words: [
                            {word: "金龙", translation: "golden dragon", type: "noun", pronunciation: "jīn lóng"},
                            {word: "对", translation: "to", type: "preposition", pronunciation: "duì"},
                            {word: "李明", translation: "Li Ming", type: "noun", pronunciation: "lǐ míng"},
                            {word: "说", translation: "said", type: "verb", pronunciation: "shuō"},
                            {word: "勇敢", translation: "brave", type: "adjective", pronunciation: "yǒng gǎn"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "年轻人", translation: "young man", type: "noun", pronunciation: "nián qīng rén"},
                            {word: "你", translation: "you", type: "pronoun", pronunciation: "nǐ"},
                            {word: "有", translation: "have", type: "verb", pronunciation: "yǒu"},
                            {word: "纯洁", translation: "pure", type: "adjective", pronunciation: "chún jié"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "心", translation: "heart", type: "noun", pronunciation: "xīn"},
                            {word: "我", translation: "I", type: "pronoun", pronunciation: "wǒ"},
                            {word: "要", translation: "want", type: "verb", pronunciation: "yào"},
                            {word: "给", translation: "give", type: "verb", pronunciation: "gěi"},
                            {word: "你", translation: "you", type: "pronoun", pronunciation: "nǐ"},
                            {word: "一个", translation: "a", type: "number", pronunciation: "yī gè"},
                            {word: "机会", translation: "chance", type: "noun", pronunciation: "jī huì"}
                        ]
                    },
                    {
                        id: 9,
                        original: "'明天早上，当太阳升起的时候，跟着河流向北走，你会找到你寻找的东西。'",
                        translation: "'Tomorrow morning, when the sun rises, follow the river northward, and you will find what you seek.'",
                        words: [
                            {word: "明天", translation: "tomorrow", type: "noun", pronunciation: "míng tiān"},
                            {word: "早上", translation: "morning", type: "noun", pronunciation: "zǎo shàng"},
                            {word: "当", translation: "when", type: "conjunction", pronunciation: "dāng"},
                            {word: "太阳", translation: "sun", type: "noun", pronunciation: "tài yáng"},
                            {word: "升起", translation: "rises", type: "verb", pronunciation: "shēng qǐ"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "时候", translation: "time", type: "noun", pronunciation: "shí hòu"},
                            {word: "跟着", translation: "follow", type: "verb", pronunciation: "gēn zhe"},
                            {word: "河流", translation: "river", type: "noun", pronunciation: "hé liú"},
                            {word: "向", translation: "toward", type: "preposition", pronunciation: "xiàng"},
                            {word: "北", translation: "north", type: "noun", pronunciation: "běi"},
                            {word: "走", translation: "walk", type: "verb", pronunciation: "zǒu"},
                            {word: "你", translation: "you", type: "pronoun", pronunciation: "nǐ"},
                            {word: "会", translation: "will", type: "verb", pronunciation: "huì"},
                            {word: "找到", translation: "find", type: "verb", pronunciation: "zhǎo dào"},
                            {word: "你", translation: "you", type: "pronoun", pronunciation: "nǐ"},
                            {word: "寻找", translation: "seek", type: "verb", pronunciation: "xún zhǎo"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "东西", translation: "thing", type: "noun", pronunciation: "dōng xī"}
                        ]
                    },
                    {
                        id: 10,
                        original: "李明醒来后，发现这个梦非常清晰，好像真的发生过一样。",
                        translation: "After Li Ming woke up, he found that the dream was very clear, as if it had really happened.",
                        words: [
                            {word: "李明", translation: "Li Ming", type: "noun", pronunciation: "lǐ míng"},
                            {word: "醒来", translation: "woke up", type: "verb", pronunciation: "xǐng lái"},
                            {word: "后", translation: "after", type: "preposition", pronunciation: "hòu"},
                            {word: "发现", translation: "found", type: "verb", pronunciation: "fā xiàn"},
                            {word: "这个", translation: "this", type: "pronoun", pronunciation: "zhè gè"},
                            {word: "梦", translation: "dream", type: "noun", pronunciation: "mèng"},
                            {word: "非常", translation: "very", type: "adverb", pronunciation: "fēi cháng"},
                            {word: "清晰", translation: "clear", type: "adjective", pronunciation: "qīng xī"},
                            {word: "好像", translation: "as if", type: "adverb", pronunciation: "hǎo xiàng"},
                            {word: "真的", translation: "really", type: "adverb", pronunciation: "zhēn de"},
                            {word: "发生过", translation: "happened", type: "verb", pronunciation: "fā shēng guò"},
                            {word: "一样", translation: "same", type: "adverb", pronunciation: "yī yàng"}
                        ]
                    }
                ]
            },
            {
                title: "第三章：神奇的发现 (Chapter 3: The Amazing Discovery)",
                sentences: [
                    {
                        id: 11,
                        original: "第二天早上，李明决定按照梦中龙的指示去寻找龙珠。",
                        translation: "The next morning, Li Ming decided to follow the dragon's instructions from his dream to search for the dragon pearl.",
                        words: [
                            {word: "第二天", translation: "next day", type: "noun", pronunciation: "dì èr tiān"},
                            {word: "早上", translation: "morning", type: "noun", pronunciation: "zǎo shàng"},
                            {word: "李明", translation: "Li Ming", type: "noun", pronunciation: "lǐ míng"},
                            {word: "决定", translation: "decided", type: "verb", pronunciation: "jué dìng"},
                            {word: "按照", translation: "according to", type: "preposition", pronunciation: "àn zhào"},
                            {word: "梦中", translation: "dream", type: "noun", pronunciation: "mèng zhōng"},
                            {word: "龙", translation: "dragon", type: "noun", pronunciation: "lóng"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "指示", translation: "instructions", type: "noun", pronunciation: "zhǐ shì"},
                            {word: "去", translation: "go", type: "verb", pronunciation: "qù"},
                            {word: "寻找", translation: "search", type: "verb", pronunciation: "xún zhǎo"},
                            {word: "龙珠", translation: "dragon pearl", type: "noun", pronunciation: "lóng zhū"}
                        ]
                    },
                    {
                        id: 12,
                        original: "他沿着河流向北走了整整一天，最终到达了一座高山的脚下。",
                        translation: "He walked northward along the river for a whole day and finally reached the foot of a high mountain.",
                        words: [
                            {word: "他", translation: "he", type: "pronoun", pronunciation: "tā"},
                            {word: "沿着", translation: "along", type: "preposition", pronunciation: "yán zhe"},
                            {word: "河流", translation: "river", type: "noun", pronunciation: "hé liú"},
                            {word: "向", translation: "toward", type: "preposition", pronunciation: "xiàng"},
                            {word: "北", translation: "north", type: "noun", pronunciation: "běi"},
                            {word: "走了", translation: "walked", type: "verb", pronunciation: "zǒu le"},
                            {word: "整整", translation: "whole", type: "adverb", pronunciation: "zhěng zhěng"},
                            {word: "一天", translation: "one day", type: "noun", pronunciation: "yī tiān"},
                            {word: "最终", translation: "finally", type: "adverb", pronunciation: "zuì zhōng"},
                            {word: "到达了", translation: "reached", type: "verb", pronunciation: "dào dá le"},
                            {word: "一座", translation: "a", type: "number", pronunciation: "yī zuò"},
                            {word: "高山", translation: "high mountain", type: "noun", pronunciation: "gāo shān"},
                            {word: "的", translation: "of", type: "particle", pronunciation: "de"},
                            {word: "脚下", translation: "foot", type: "noun", pronunciation: "jiǎo xià"}
                        ]
                    }
                ]
            }
        ]
    },

    // === GRAMMAR-BASED FILL IN THE BLANKS ===
    fillInBlanks: [
        {
            sentence: "这是老人___故事",
            options: ["的", "在", "里", "中"],
            correctAnswer: "的",
            explanation: "Use 的 to show possession - 'the old man's story'",
            grammarFocus: "chinese-particles"
        },
        {
            sentence: "龙___水里游泳",
            options: ["的", "在", "里", "中"],
            correctAnswer: "在",
            explanation: "Use 在 to show location - 'the dragon is swimming in the water'",
            grammarFocus: "chinese-particles"
        },
        {
            sentence: "一___龙飞向天空",
            options: ["个", "条", "座", "本"],
            correctAnswer: "条",
            explanation: "Use 条 for long creatures like dragons",
            grammarFocus: "measure-words"
        },
        {
            sentence: "三___山很高",
            options: ["个", "条", "座", "本"],
            correctAnswer: "座",
            explanation: "Use 座 for large structures like mountains",
            grammarFocus: "measure-words"
        },
        {
            sentence: "老人昨天___村庄里讲故事",
            options: ["在", "的", "里", "中"],
            correctAnswer: "在",
            explanation: "Word order: Subject + Time + Place (在 + location) + Verb + Object",
            grammarFocus: "chinese-word-order"
        },
        {
            sentence: "山___读音是第几声？",
            options: ["第一声", "第二声", "第三声", "第四声"],
            correctAnswer: "第一声",
            explanation: "山 (shān) uses first tone - high and flat",
            grammarFocus: "chinese-tones"
        }
    ],

    // === GRAMMAR CORRECTION EXERCISES ===
    corrections: [
        {
            incorrect: "龙里水游泳",
            correct: "龙在水里游泳",
            explanation: "Need 在 (at/in) before location marker 里",
            grammarFocus: "chinese-particles"
        },
        {
            incorrect: "老人在村庄昨天讲故事",
            correct: "老人昨天在村庄里讲故事",
            explanation: "Time (昨天) must come before place (在村庄里)",
            grammarFocus: "chinese-word-order"
        },
        {
            incorrect: "五龙飞在天空",
            correct: "五条龙飞在天空中",
            explanation: "Need measure word 条 for dragons and location marker 中",
            grammarFocus: "measure-words"
        }
    ]
};