题目内容
【题目】—What are they doing now?
—They are busy________articles in the room.
A.to write
B.write
C.writing
D.to writing
【答案】C
【解析】be busy doing sth忙于做某事。
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题目内容
【题目】—What are they doing now?
—They are busy________articles in the room.
A.to write
B.write
C.writing
D.to writing
【答案】C
【解析】be busy doing sth忙于做某事。