题目内容

【题目】We have no idea what air we will be breathing in the future if we anything to stop hazy weather.

A. hadn’t done B. didn’t do

C. haven’t done D. don’t do

【答案】D

【解析】考查时态。句意为：我们不知道如果我们不采取措施阻止雾霾天气的话，我们未来将呼吸什么样的空气。根据主句的时态和时间状语“in the future”可知，if条件句要用一般现在时表将来。根据句意可知选D。

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