单选题
He is not satisfied with his exam results and wishes he______ harder for his exams.
A、
has studied
B、
would study
C、
studies
D、
had studied
【正确答案】
D
【答案解析】
wish后面的宾语从句表示与过去事实相反的虚拟语气，故应使用过去完成时态。
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