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—Where are you,Mary?—I am in the study,______to my penfriend in Beijing.A.to write B.writing

分类: 作业答案 • 2022-03-09 18:03:43

问题描述：

—Where are you,Mary?—I am in the study,______to my penfriend in Beijing.A.to write B.writing

答

B.writing
现在分词短语作伴随状语