问题详情:
Sorry for having delayed _______ your letter.
A. to have answered B. to answer C. answering D. having been answered
【回答】
C
知识点:非谓语动词
题型:选择题
问题详情:
Sorry for having delayed _______ your letter.
A. to have answered B. to answer C. answering D. having been answered
【回答】
C
知识点:非谓语动词
题型:选择题