The train leaves at 6:00 p.m.So I have to be at the station 5:40 p.m. at the lastest.A. un

问题补充：

The train leaves at 6:00 p.m.So I have to be at the station 5:40 p.m. at the lastest.

A. until

B. after

C. by

D. around

答案：

A. until

B. after

(答案→)C. by

D. around

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