The airplane leaves at 7:00 p.m. So I have to be at the airport 5:40 p. m. at the latest.

问题补充：

The airplane leaves at 7:00 p.m. So I have to be at the airport 5:40 p. m. at the latest.

A. by

B. after

C. until

D. in

答案：

(答案→)A. by

B. after

C. until

D. in

解析：可联系答.案.网客服索取。