I’m sorry I delayed your letter because I have been quite busy these days.A. to answerB. t

发布时间：2020-08-16 12:39:09

I’m sorry I delayed     your letter because I have been quite busy these days.
A. to answer
B. to have answered
C. answering
D. answered

网友回答

A. to answer
B. to have answered
(答案→)C. answering
D. answered
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