【題目】It’s high time we _____ some actions to prevent pollution.

A. take B. took C. taking D. is taking

【答案】B

【解析】

試題分析：考察虛擬語氣。It’s high time that從句中必須使用虛擬語氣，即從句使用過去式或謂語由“should＋動詞原形”構(gòu)成，后種變化的should不能省略，所以答案是B。

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