问题描述：
He did very badly in the exam.He failed the exam.(合并为一句)
He did ______ ______ ______ he failed the exam.
He did ______ ______ ______ ______ the exam.
He ______ ______ _______ enough ______ ______ the exam.
He did ______ ______ ______ he failed the exam.
He did ______ ______ ______ ______ the exam.
He ______ ______ _______ enough ______ ______ the exam.
问题解答：
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