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

A. don’t; will be B. won’t; isn’t

C. won’t; is D. don’t; won’t be

【答案】A

【解析】試題分析：考查含有條件狀語從句的復合句用法。if引導條件狀語從句, 句中使用一般現(xiàn)在時表示將來動作, 而主句使用一般將來時。

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