I have kept the book the morning of May 1.A. onB. inC. sinceD. of

发布时间：2020-08-21 07:14:58

I have kept the book      the morning of May 1.
A. on
B. in
C. since
D. of

网友回答

A. on
B. in
(答案→)C. since
D. of
解析：具体某一天的上下午或晚上时，要用介词on。
以上问题属网友观点，不代表本站立场，仅供参考！