Look! The tree is growing well. When______?

A．was it planted

B．did it plant

C．will it be planted

D．is it planted

 

【答案】

A

【解析】此題考查一般過去時的被動語態(tài)的基本構(gòu)成。其構(gòu)成是was/were+動詞的過去分詞。本句的含義是，看，這棵樹長得真好，什么時候栽上的？栽發(fā)生在過去，故用A。

 

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