Li Gang was required to apologize the people present at the meetingwhat he had done.A. for

问题补充：

Li Gang was required to apologize the people present at the meetingwhat he had done.

A. for；by

B. with；about

C. to；for

D. at；with

答案：

A. for；by

B. with；about

(答案→)C. to；for

D. at；with

解析：考查介词。apologize to sb for sth 是固定搭配，意为“因某事向某人道歉”。