【題目】We must do something useful to _______ pollution.

A. cut off B. cut up C. cut down D. cut in

【答案】C

【解析】

句意：我們必須做一切有用的事情來減少污染。cut down意為“減少”；cut off意為“切除”，cut up意為“切碎”，cut in意為“插嘴，干預”，這里是說要“減少”污染，故選C。

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