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【答案】Trees ________ in winter but in spring.

Trees ________ in winter but in spring.

A. can not plant

B. can be not planted

C. can not be planted

D. can plant

【答案】

C

【解析】

句意:树木不可以在冬天被种植,而是在春天。主语trees与谓语plant之间表示被动关系,故用被动语态,故排除AD两项。情态动词can的否定形式,在can后加not,故选C。

答案有错

上一篇:We must do something useful to _______ pollution.

下一篇:Be sure not ________ that again.

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