I get up6:40the morning.A. at; atB. in; inC. at; inD. in at

问题补充：

I get up6:40the morning.

A. at; at

B. in; in

C. at; in

D. in , at

答案：

A. at; at

B. in; in

(答案→)C. at; in

D. in , at

解析：句意：我在早上6:40起床。在6点40用介词at;在早晨，在下午用介词in.