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        1. A number of high buildings have arisen ________ there was nothing a year ago but ruins.(2012·山東)
          A.whenB.whereC.beforeD.until
          B
          句意:很多高樓在一年前還是廢墟的地方拔地而起。where引導地點狀語從句;而when,before和until都引導時間狀語從句。
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