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题目内容
（贵州理工学院大学英语）
He didn’t pass the final examination. He ______ it.
(A) must have prepared for
(B) ought to prepare for
(C) ought to have prepared for
(D) ought to prepare for
(A) must have prepared for
(B) ought to prepare for
(C) ought to have prepared for
(D) ought to prepare for
参考答案