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The environment in my hometown is improv...

The environment in my hometown is improving because many trees __________ every year.

A.plant B.are planted C.planted D.were planted

 

B 【解析】 句意:我家乡的环境正在改善,因为每年都种很多树。 考查一般现在时的被动语态。plant种植,动词原形;are planted一般现在时的被动语态;planted过去式或过去分词;were planted一般过去时的被动语态。题干句是一个主从复合句,because 引导的是原因状语从句,从句的主语是many trees,与谓语动词plant之间是被动关系,所以应用被动语态;再由every year 可知句子时态是一般现在时,所以空格上应该填一般现在时的被动语态,其结构为:am/is/are+及物动词的过去分词,只有B选项符合要求,故答案选B。  
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