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        1. —________did your uncle leave his hometown?
          —He ________ for nearly twenty years.
          A.When; has leftB.When; has been away
          C.How long; has leftD.How long; has been away
          B

          試題分析:when什么時候;how long多長;根據(jù)下文時間狀語,將近二十年了?芍衔奶釂柕氖菚r間長短,下文描述的是從過去某時持續(xù)到現(xiàn)在的狀態(tài),故謂語動詞用持續(xù)性動詞,故選B。
          點評:完成時態(tài)中的動詞有瞬間動詞和持續(xù)性動詞之分,瞬間動詞的過去分詞強調(diào)的是動作的完成,持續(xù)性動詞強調(diào)的是動作的持續(xù)性,F(xiàn)在完成時態(tài)中表示一段時間的時間狀語不能和瞬間動詞連用,持續(xù)性動詞不能和表示瞬間時間的時間狀語連用,需注意區(qū)分。
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