2 . 根据句子内容，从每组的选项中选出能匹配句子中划线部分意义的选项。每组选项中有两项为多余选项。

A. be put into prison B. worthy of attention; striking C. to organise and/or do a particular activity D. a place, person or thing that you get sth. from E. the act of leaving secretly or without explanation F. the desire or determination to be successful, rich, powerful, etc. G. a supply of sth. that a country, an organisation or a person has and can use

1. She was intelligent but suffered from a lack of ambition.
2. Time is your most valuable resource, especially in examinations.
3. The magician did a remarkable job of holding the audience’s attention.
4. Martin Luther King was put behind bars for organising many peaceful protests.
5. They conduct a survey to find out what type of technical support customers want.

4 . 根据语境及汉语提示写出正确的单词
1. Benjamin Franklin’s famous __________(实验) with lightning
2. a ________ (金属) key
3. be ________(系) to the string
4. _______(传导) through the string to the key
5. ________(科学的) experiment
6. ________ (完全地) true
7. more than one _______(记述)
8. the ________ (起源) of life

6 . Metal ________ ________ ________ than wood.
金属传热性能比木头好。

8 . A study about the problem of water pollution ________ .
这两位科学家现在正在进行水污染问题的研究。