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【题目】—It’s necessary ____ our environment.

—I agree with you.

A.protectB.protectingC.to protectD.protects

【答案】C

【解析】

句意:——保护我们的环境是必要的。——我同意你的看法。

考查it固定结构。本句是固定句型“It’s + adj. + to do sth.”结构,表示“做某事是……的”,it是形式主语,to do sth. 是真正的主语。根据句意结构,故选C

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