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主题：
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be busy doing sth. |
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内容：
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She''s busy ________her mother with some housework after school.
A. with help B. to help C. helping D. to helping |
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提交人：
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xiaolile
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时间：
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5/27/2002 14:1:4
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主题：
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be busy doing sth |
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内容：
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She''''s busy ________her mother with some housework after school.
A. with help B. to help C. helping D. to helping
解答：be busy doing sth忙于作某事，所以答案是C。 |
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提交人：
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tchdaishh
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时间：
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5/27/2002 14:1:4
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