问题补充:
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
答案:
A. to answer
B. to have answered
(答案→)C. answering
D. answered
解析:可联系答.案.网客服索取。
时间:2021-05-01 20:24:46
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
A. to answer
B. to have answered
(答案→)C. answering
D. answered
解析:可联系答.案.网客服索取。