【分析】
本题为英语演讲稿补全写作题，需根据给定的5个要点提示，结合已给开头完成约70词的演讲稿，要求语句通顺、意思连贯。解题思路：1. 先承接开头介绍Mandy的基本身份信息（年龄、班级）；2. 依次说明居住情况、外貌特征；3. 阐述最喜欢的学科并适当补充相关细节；4. 描述周末活动及与“我”的互动；5. 收尾使内容完整，确保覆盖所有要点且符合词数要求。
【解析】
首先承接开头句“My best friend is Mandy.”，依次完成各要点：
1. 介绍身份：She is 14 years old and she is in Class 2, Grade 7.
2. 说明居住情况：Now she lives in Xuzhou with her parents.
3. 描述外貌：She wears a pair of glasses.
4. 说明最喜欢的学科并补充细节：Her favourite subject is English, and she often helps me learn English.
5. 描述周末活动及互动：At weekends, she likes reading books in the library, and we often go there together to enjoy different stories. 最后补充一句体现友谊的话使内容完整：We always have a great time with each other.
【答案】
She is 14 years old and she is in Class 2, Grade 7. Now she lives in Xuzhou with her parents. She is a kind girl and wears a pair of glasses. Her favourite subject is English, and she often helps me learn English. At weekends, she likes reading books in the library, and we often go there together to enjoy different stories. We always have a great time with each other.
【知识点】
英语应用文写作、英语要点式写作、英语语句连贯
【点评】
该作文严格覆盖所有给定要点，适当添加了符合语境的细节（如帮学英语、同去图书馆），语句通顺自然，符合演讲稿的表达要求，词数达标，是一篇优秀的写作范例。
【难度系数】
0.3