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【BythetimeMrs.JacksonarrivedinShanghai,Mrs.Jackson_______manyfamouscitiesinChina.A.visitedB.wasvisitingC.hadvisitedD.hasvisited】
题目内容：
By the time Mrs.Jackson arrived in Shanghai,Mrs.Jackson _______ many famous cities in China.
A.visited B.was visiting C.had visited D.has visited优质解答
C by +过去的时间,主句谓语动词用过去完成时态.
A.visited B.was visiting C.had visited D.has visited
优质解答
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