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Peterknew.A.whetherhehasfinishedreadingthebookB.whytheboyhadsomanyquestionsC.therewere12monthsinayearD.whentheywillleaveforParis

题目详情
Peter knew _______________.
A.whether he has finished reading the book
B.why the boy had so many questions
C.there were 12 months in a year
D.when they will leave for Paris
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答案和解析
选B
主句是过去式,所以从句也要为过去时态
所以AD不对
而一年中有12个月是事实,不用过去时,要用现在时,所以也不对
所以选B