I congratulated Ann ________ passing the exam. She spent a lot of time studying.

Câu hỏi :

I congratulated Ann ________ passing the exam. She spent a lot of time studying.

A. at

B. in

C. about

D. on

* Đáp án

D

* Hướng dẫn giải

congratulate sb on sth: chúc mừng ai về điều gì

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