问题标题:
【高一英语选择题需要理由It'ssaidthatonekindoftimemachine_____byasceientist,withwhichmancantravelwhereverhewouldlike.A.hadbeeninventedB.hasbeeninventedC.hadbeendicoveredD.hasdiscovered】
问题描述:
高一英语选择题需要理由
It'ssaidthatonekindoftimemachine_____byasceientist,withwhichmancantravelwhereverhewouldlike.
A.hadbeeninventedB.hasbeeninvented
C.hadbeendicoveredD.hasdiscovered
李清权回答:
选B.现在完成时的被动语态:have/hasbeendone
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