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4. Mr Hu told us to do our homework as (quick) as we could.

3. Stamps are used for (post) letters.

2. Many children are (interest) in modern robots.

1. Does your mother often make you (do) the housework at home?

2. — Are there any (硬幣) in the box?   — No.

1.  (no matter what) you do,don't miss this chance.

19. 把機器人歸還到……20. 太多的麻煩 

17. 看起來和新的一樣 18. 做所有的家務活

15. 保存在垃圾箱里 16. 他的私人文件

13. 犯愚蠢的錯誤 14. 放在床上