题目内容

4.-Look!The hill is getting green.
-So it is.Each year,a large number of trees     there.(  )
A.plantB.Were plantedC.are plantedD.planted

分析 ---看,山变绿了.
---的确如此.每年那里都种植大量的树.

解答 答案:C.主语tree是动词plant的承受者,构成被动关系,结合every year表达的是经常性的动作用一般现在时,故用一般现在时的被动语态am/is/are+过去分词,主语是复数,故are,plant的过去分词是planted,故答案是C.

点评 一般现在时的被动语态am/is/are+过去分词的呈现,各种类型的被动语态的构成要理解掌握.

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