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        1. You can't watch TV _______ you finish your homework.

          A.before B.if
          C.while D.a(chǎn)s

          A

          解析試題分析:句意:在你做完作業(yè)之前不可以看電視。A. before“在……之前”;B. if“如果”;C. while“當(dāng)……時(shí)候”;D. as“像……一樣”。結(jié)合句意,故選A。
          考點(diǎn):考查連詞的辨析。

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