The students are going to raise some money the poor the afternoon of May 21st.
A. to; on
B. for; on
C. to; in
D. for; in
网友回答
A. to; on
(答案→)B. for; on
C. to; in
D. for; in
解析：句型raise sth。 For sb
On的用法 on+具体的某一天或具体的某一天早上/中午/晚上
the afternoon of May 21st为5月21日的下午
故选B