单选题
He insisted that we ______ to pass the exam．
A、
[A] study harder
B、
[B] have studied harder
C、
[C] have studied harder
【正确答案】
A
【答案解析】
[解析] insist有两种用法，一种是insist on doing sth，另一种是insist +that+sb./sth．+(should)+动词原型。此句属于后一种，所以应该选[A]。
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