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

5. I do → I have.

4. how → what， what作引導詞， 同時作they can do中動詞do的賓語。

3. What → How, what修飾名詞， 而how修飾形容詞、 副詞， 用于感嘆句。

2. of those → of which, those不是關系代詞， 不可引導定語從句。

1. which → where， to live → to live in， live是不及物動詞。

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

　 　 　-I think Mr. Kim is.

　　 注 釋

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.