5．Our city is very clean and beautiful because the streets every day．( )A．cleanB．are cleanedC——青夏教育精英家教网——

5．Our city is very clean and beautiful because the streets ______ every day．（　　）

4．--I'm afraid that I can't take a walk with you today．Jack．Maybe ______time．
--What a pity （遺憾）！（　　）

3．Listen，the boys ______with each other over there．Please go and see what has happened．（　　）

2．My father doesn't like smoking，so the cigarette _____ be his．（　　）

1．---A storm is on the way．Don't forget _____the Windows when you go to sleep，Mike．
---I won't，mum．（　　）

20．---Will you go shopping with me，June？
---Yes．but I won't go _____ I finish my homework．（　　）

19．---David，would you mind not ______ any noise？I'm studying．
---Sorry，Tom．（　　）

18．My children have to spend ____ time on their homework every day．So they are very tired．（　　）

17．---What's the matter with my daughter，doctor？
---Just a little cold．There's _____ serious，Madam．（　　）

16．Lucy didn't come to school yesterday because she had to ______ her sick mother at home．（　　）

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