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        1. So far, the moon ________ by man already.  
          A.is visited B.will be visited C.has been visited D.was visited
          C

          試題分析:句意:到目前為止,人類已經(jīng)登上了月球。So far 引導(dǎo)的句型,一般用現(xiàn)在完成時,本句也是被動語態(tài)。故選C。
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