问题描述：
求教1道选择题:The teacher asked us ( ) .A.B.C.D.-----谢谢!
The teacher asked us ( ) .
A.whose hat was this B.whose hat this was C.whose hat is this D.whose hat this is
求教!
The teacher asked us ( ) .
A.whose hat was this B.whose hat this was C.whose hat is this D.whose hat this is
求教!
问题解答：
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