6. to give it up → give it up, why not其后接不带to的不定式。

5. I do → I have.

4. how → what， what作引导词， 同时作they can do中动词do的宾语。

3. What → How, what修饰名词， 而how修饰形容词、 副词， 用于感叹句。

2. of those → of which, those不是关系代词， 不可引导定语从句。

1. which → where， to live → to live in， live是不及物动词。

10. -Who you think is the richest man in this town?

　 　 　-I think Mr. Kim is.

　　 注 释

9. -Those shirts are very expensive.

　 -Do you know how they cost?

8. Someone is at the door. Who is he?

7. These photos will show you how our village looks like.