She asked me if I knew?A、whose pen is it B、whose pen it was C、whose pen it is D、whose pen was it

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She asked me if I knew?
A、whose pen is it B、whose pen it was C、whose pen it is D、whose pen was it

B 首先,用陈述句语序,排除A和D 其次,主句是过去时,从句也用过去时,排除C