新概念英语第二册 Lesson 4
练习材料：
Lesson 7 Too Late. First listen and then answer the question: did the detectives save the diamonds?
任务配置：L0 + L4
知识笔记：
单词：
- diamond
- parcel
- earlier
- airfield
词组：
- Customs House,
- to thier surprise,
练习感悟：
Answer:
Thoughts: 关键词 hold on.
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