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        1. (2006·徐州中考題)

          There have been many changes ________ in my hometown in the last twenty years.

          [  ]

          A.happen
          B.happened
          C.happening
          D.to happen

          答案:C
          解析:

          解析:這個句子的意思很明顯:在最近的二十年的時間里,我的家鄉(xiāng)發(fā)生了很多變化。這是個there be句型,been是這個句子的謂語動詞,故 happen應(yīng)該使用非謂語形式。由于happen是不及物動詞,故只能使用其ing形式。因此本題正確答案為C。


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