问题 选择题

Many trees ________ along the streets every year. So the air is very fresh now.

A.plant

B.are planted

C.planted

D.were planted

答案

答案:B

句意:每年沿着大街都要种很多树。因此现在空气很清新。结合语境可知前文描述的是客观性的动作,故用一般现在时态。主语是动作对象,故用被动语态。选B。

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