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【题目】If we _______ take environment problems seriously , the earth ______worse and worse.

A.don’t ; won’t beB.won’t be ; isn’t

C.won’t ; isD.don’t ; will be

【答案】D

【解析】

句意:如果我们不认真对待环境问题,地球会变得越来越糟。

考查if条件状语从句的用法。根据题干及语境,可知此句是if引导的条件状语从句,if的意思为"如果";其时态遵循主将从现;所以前面的从句应用一般现在时表将来,此句是指如果我们不认真对待环境问题,故用否定的don't;故排除BC选项;后面的主句是指"地球将会变得越来越糟",所以表肯定,主句用一般将来时,will+动词原形;综合以上分析,故答案选D

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