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        1. 【題目】Everyone should do something to protect the environment________ it is too late.

          A.afterB.sinceC.beforeD.when

          【答案】C

          【解析】

          句意:每個(gè)人都應(yīng)該做點(diǎn)什么來(lái)保護(hù)環(huán)境,否則一切都太晚了。

          考查連詞。after在……之后,可引導(dǎo)時(shí)間狀語(yǔ)從句;since自從,可引導(dǎo)時(shí)間狀語(yǔ)從句;before在……之前,可以引導(dǎo)時(shí)間狀語(yǔ)從句;when當(dāng)什么時(shí)候,引導(dǎo)時(shí)間狀語(yǔ)從句。根據(jù)句意,希望每個(gè)人在一切都太晚之前都作出努力,before符合題意,故選C。

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