You have failed to pass CET 4 again I think you______harder.A、ought have studied

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问题 You have failed to pass CET 4 again I think you______harder.

选项 A、ought have studied
B、ought to have studied
C、must have studied
D、may have studied

答案 B

解析

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YouhavefailedtopassCET4againIthinkyou______harder.A、oughthavestudied