---When do you usually take a shower?---I take a shower the morning.A. atB. inC. onD. of

问题补充：

---When do you usually take a shower?

---I take a shower the morning.

A. at

B. in

C. on

D. of

答案：

A. at

(答案→)B. in

C. on

D. of

解析：考查固定短语：在早晨in the morning,所以选B。