is generally agreed that people should love and protect the environment.A. ThatB. AsC. WhichD. It

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【题目】________ is generally agreed that people should love and protect the environment.

A. ThatB. As

C. WhichD. It

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【答案】D

【解析】

考查it做形式主语。句意：人们普遍认为人们应该热爱和保护环境。本句的主语为形式主语 it 代替后面的真正主语 that 从句：It is generally agreed that......“人们普遍认为......”故选D。