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        1. The government has taken some measures to solve the shortage of electricity, but it may be some time ____________ the situation improves.
          A.sinceB.whenC.unlessD.before
          D

          試題分析:考察固定句式。固定句式:It be 一段時(shí)間 before…一段時(shí)間以后某事才發(fā)生;如果before后面使用一般現(xiàn)在時(shí),前面的主語使用將來時(shí);如果before后面使用一般過去時(shí),前面也使用一般過去時(shí)。句意:政府已經(jīng)采取措施來解決電量短缺的問題,但是也許要一段時(shí)間以情況才會有所改善。故D正確。
          點(diǎn)評:固定句式的考察是時(shí)態(tài)以及連詞考察的重點(diǎn),本句中的固定句式:It be 一段時(shí)間 before…一段時(shí)間以后某事才發(fā)生;如果before后面使用一般現(xiàn)在時(shí),前面的主語使用將來時(shí);如果before后面使用一般過去時(shí),前面也使用一般過去時(shí)。
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