题目内容
Tony is busy _______ his homework.
A.doing |
B.do |
C.to do |
D.does |
【答案】
A
【解析】be busy doing sth,表示忙于某事,故选A
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题目内容
Tony is busy _______ his homework.
A.doing |
B.do |
C.to do |
D.does |
A
【解析】be busy doing sth,表示忙于某事,故选A