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        1. Sarah knew nothing about it ____________ her sister told her.
          A. if                      B. until                    C. since
          B

          試題分析:if如果,是否;until直到; since由于,自從。句意:直到她的妹妹告訴她,她什么都不知道。故選B。
          點評:連詞在句子中主要起聯(lián)系上下文的作用,他們之間的區(qū)別就是表示邏輯關系的不同,所以在解題時先要理解上下文含義,然后根據(jù)上下文邏輯關系選擇合適的連詞。連詞的用法都比較多,語義之間還有交叉,熟記其基本應用規(guī)則,了解其區(qū)別,注意固定搭配對象,是做好此類題型的關鍵。
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