题目内容
He can’t help __ housework, for he is busy __ for the examination.
A. doing; preparing B. to do; to prepare C. doing; to prepare D. to do; preparing
D
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题目内容
He can’t help __ housework, for he is busy __ for the examination.
A. doing; preparing B. to do; to prepare C. doing; to prepare D. to do; preparing
D