Wecouldn'tfindout________,sowegav

发布时间：2020-07-26 21:56:14

We couldn't find out ________, so we gave it to the teacher．A.whose pen was itB.whose pen it wasC.it was whose penD.where the pen was

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B解析whose引导宾语从句．宾语从句应该使用陈述句形式．
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