题目内容

从A-G中选出可以填入对话空白处的最佳选项。选项中有两项为多余选项。

A:It is a lovely weather, isn't it?

B:Very lovely.

A:The air today is nice and clean.But it was bad years ago.

B:  1  .There was air pollution then.

A:But how did that happen?

B:  2  .And the wind blows the sand.

A:Yes.But how did the air become clear?

B:You see.  3  .It has become a green city.

A:I love trees.  4  .They cool the air as well as clean it.

B:People in this city must have done a lot to make the city clean.  5  

A:I agree with you.It is our duty.

答案:D,B,E,A,F
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