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________hergrandmabefore,hedidn’tknowshewashisgrandmaev...

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问题详情:

________hergrandmabefore,hedidn’tknowshewashisgrandmaev...

________her grandma before, he didn’t know she was his grandma even if his mother had told him.(   )

A.Not being seen

B.Not having seen

C.Having not seen

D.Not seeing

【回答】

B

知识点:动词时态与语态

题型:选择题

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