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【題目】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：如果我們不認真對待環(huán)境問題，地球會變得越來越糟。

考查if條件狀語從句的用法。根據題干及語境，可知此句是if引導的條件狀語從句，if的意思為"如果"；其時態(tài)遵循主將從現(xiàn)；所以前面的從句應用一般現(xiàn)在時表將來，此句是指如果我們不認真對待環(huán)境問題，故用否定的don't；故排除B、C選項；后面的主句是指"地球將會變得越來越糟"，所以表肯定，主句用一般將來時，will＋動詞原形；綜合以上分析，故答案選D。

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