64. He didn’t pass the final examination. He _______it. 他没通过考试。他本来应该为考试做准备的。 A. must have prepared for B. ought to prepare for C. ought to have prepared for D. should prepare for

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题目内容（东华大学大学英语4）

64. He didn’t pass the final examination. He _______it. 他没通过考试。他本来应该为考试做准备的。
A. must have prepared for
B. ought to prepare for
C. ought to have prepared for
D. should prepare for

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