Did you konw ( )? A.how long she has been to Shanghai B.if she will come next year or not
问题描述：
Did you konw ( )? A.how long she has been to Shanghai B.if she will come next year or not
C.why they didn't leave here yesterday D.whom she is looking for just now
答
C
did you know +宾语从句,主句是过去时,宾语从句一般也用过去时
不明白的再问哟,请及时采纳,多谢!