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        1. Beijing ________ a lot over the years. Now it has become one of the biggest
          ______ in the world.
          A.changes; citiesB.changed; city
          C.has changed; citiesD.changed; cities
          C

          試題分析:句意:這些年北京變化很多,F(xiàn)在它已經(jīng)成為世界最大的城市之一。與時間短語over the years.連用時,用現(xiàn)在完成時。由one of來修飾時,后面用名詞的復(fù)數(shù)形式。故選C。
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