题目内容
【题目】Li Ming is busy_______ his homework now.
A. do B. does C. to do D. doing
【答案】D
【解析】
试题分析：句意：李明现在正忙于做他的家庭作业。be busy doing sth.忙于做某事。故答案为D。
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题目内容
【题目】Li Ming is busy_______ his homework now.
A. do B. does C. to do D. doing
【答案】D
【解析】
试题分析：句意：李明现在正忙于做他的家庭作业。be busy doing sth.忙于做某事。故答案为D。