2 . 然而，当我更仔细地观察它时，我发现了一些有趣的事情。(关联，状语从句的省略形式)
________, _____________ at it more closely, I see something interesting.

4 . 是什么让一个人比另一个人聪明得多?
What makes one person ________ intelligent than another?

5 . __________(这个活动受到师生们的热烈欢迎), who took an active part in this special activity and donated clothes, gloves and so on to help the poor children. (根据汉语提示完成句子)

9 . 词性转换
1. ________adj.方便的；近便的→________ n．方便→________ adj.不方便的
2. ________adj.卡住；陷入；困于→________ vt.& vi.卡住；阻塞
3. ________n．居民；(美国的)住院医生　adj.(在某地)居住的→________ adj.适合居住的；住宅的
4. ________n．现金；金钱→________ n．收银员；收银台
5. ________adj.让人难堪(尴尬；害羞)的→________ n．尴尬→________ adj.感到尴尬的
6. ________vt.使烦恼；使生气；搅乱→________ 过去式→________ 过去分词→________ 现在分词
7. ________adj.特定的；特别的；讲究的→________ adv.特别；尤其
8. ________adj.粗鲁的；无礼的→________ adv.粗鲁地→________ n．粗鲁
9. ________n．隐私；私密→________ adj.秘密的→________ adv.秘密地
10. ________vt.给……下定义；界定；解释→________ n．定义

10 . When I was staying with a French family, I saw something unusual. (far more) (用括号中的词扩展句子)
________________.