—Where are you,Mary?—I am in the study,______to my penfriend in B_英语解答

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

人气：103 ℃　时间：2020-05-24 22:59:13

解答

B.writing
现在分词短语作伴随状语