I wonder________I should call his father.A.how B.what C.which D.who 给出理由.

问题描述:

I wonder________I should call his father.A.how B.what C.which D.who 给出理由.

选A
因为后面的从句 I should call his father是一个完整的句子,不缺成分,所以排除BCD