It’s really impolite to laugh others.A. atB. withC. toD. for

问题补充：

It’s really impolite to laugh others.

A. at

B. with

C. to

D. for

答案：

(答案→)A. at

B. with

C. to

D. for

解析：句意：嘲笑别人真是不礼貌。laugh at sb是固定短语：嘲笑某人。故选A。

考点: 考查介词的用法。