16．We won't begin our class until hecomes back．——青夏教育精英家教网——

16．We won't begin our class until hecomes （come） back．

15．You'd betternot read （not read） in the sun．

14．It's one ofthe most dangerous （danger） fish in the world．We must be far away from it．

13．Wewere planning （plan） to go to visit Xi'an when our teacher came in．

12．Are you interested inreading （read） novels？

11．You'd better ask your grandfather to stopsmoking （smoke）．It's bad for his health．

10．The girls in our class only cover 20% of the students．（　　）

9．-Must we keep the windows open all the time？
-No，we don't have to．（　　）

8．We should drink plenty of boiled water every day．（　　）

7．-Tom，could you please come and do me a favor？
-Sure．（　　）

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