We offered him our congratulations his passing the college entrance exams.A. atB. onC. fo

问题补充：

We offered him our congratulations his passing the college entrance exams.

A. at

B. on

C. for

D. of

答案：

A. at

(答案→)B. on

C. for

D. of

解析：congratulate和它的名词congratulations要求接介词on。