问题
选择题
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
答案
答案：D
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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
答案：D