Several thousands of trees ___________in our city every year.A、have plantedB、ha

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问题 Several thousands of trees ___________in our city every year.

选项 A、have planted
B、has been planted
C、are planted

答案 C

解析该句的意思是“我们城里每年要种成千上万棵树。”当句子没有说明动作的执行者是谁时，句子往往用被动的形式，又因trees用的是复数形式，故应选are planted。

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