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Mary is busy ____a picture.A.to paint B.paint C.painting D.paints

分类: 作业答案 • 2022-01-09 18:02:39

问题描述：

Mary is busy ____a picture.A.to paint B.paint C.painting D.paints

答

C.be busy doing sth .固定短语,意为"忙于做某事".