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

A. at
B. on
C. for
D. of
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科目:高中英語(yǔ) 來(lái)源:0128 期中題 題型:單選題

We offered him our congratulations _____ his passing the college entrance exams.
[     ]
A. at
B. on
C. for
D. of

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