【題目】It _________our environment if we pour waste water into the rivers.

A. is harmful to B. is important to C. is necessary for

【答案】A

【解析】句意:如果我們把廢水排入河流,對(duì)我們的環(huán)境是有害的。A. is harmful to對(duì)...有害;B. is important to 對(duì)...重要;C. is necessary for對(duì)...是必要的。廢水排入河里對(duì)環(huán)境是有害的。故選:A。

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