吉林医药卫生学校 / 英语
21.It`s bad manners to laugh _____ others when they are _____ trouble.
A. over ,at
B. to, with
C. with ,on
D. at ,in
A. over ,at
B. to, with
C. with ,on
D. at ,in
参考答案：
佳题速递：