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If we ______ take environmental problems seriously, the earth _______ worse and worse.

A．don’t; will beB．won’t; isn’t
C．won’t; isD．don’t; won’t be

A

解析試題分析：句意：如果我們不嚴肅對待環(huán)境問題，地球就會變得越來越糟糕。結合語境可知主句描述的是將來動作，故用一般將來時態(tài)。當主句描述將來動作時，英語條件狀語從句中一般用一般現(xiàn)在時態(tài)。選A。
考點：考查時態(tài)辨析

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