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        1. If you have trouble pronouncing the word, you can repeat it over and over again _______ you are comfortable with it.
          A.unlessB.if
          C.until D.while
          C

          試題分析:句意:如果你在這個單詞的發(fā)音上有問題,你可以一遍又一遍的重復(fù)知道你讀順為止。A. unless“除非”;B. if“如果”;C. until“直到…”;D. while“當(dāng)…時候”。結(jié)合句意,故選C。
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