17．-Look.it be our new headmaster．-It be him．He went to Shanghai yesterday．( )A．can'——青夏教育精英家教网——

17．-Look，it _______ be our new headmaster．
-It _______ be him．He went to Shanghai yesterday．（　　）

can't； mustn't

16．Little Peter is very shy．Whenever he _______ questions，he is always silent．（　　）

15．Many young people _______ the old．They often offer their seats to them on buses．（　　）

14．-Mr．Black，as a policeman，what do you think of your job？（　　）
-Our duty is to keep people _______ and make the society in good order．I am proud of it．

13．-How can we get to the airport？
-Let's take the airport bus．It _______ only 20minutes and it's cheaper than taking a taxi．（　　）

12．It is a good habit to wash your hands _______ you have meals．（　　）

11．Could you please say the sentence again？I want to write _______ down．（　　）

10．-Ken，would you please turn down the TV？Your brother _______ his homework．（　　）
-OK，mum．

9．This is _______ useful book for me．Thank you for lending it to me．（　　）

8．Cindy has finishedreading （read） the book"Journey to the West"．She thinks it is very fantastic．

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