The train service is very good. The trains are nearly always .............. time.

Câu hỏi :

The train service is very good. The trains are nearly always .............. time.

A. for

B. at

C. on

D. in

* Đáp án

C

* Hướng dẫn giải

Chọn C

on time: đúng giờ

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