--do you usually go to school?seven o’clock the morning. A. What time; At; inB. When; I

问题补充：

--do you usually go to school? --seven o’clock the morning.

A. What time; At; in

B. When; In; at

C. How; At; in

D. What time; At; on

答案：

(答案→)A. What time; At; in

B. When; In; at

C. How; At; in

D. What time; At; on

解析：句意：--你通常几点去上学？--在早晨七点。根据答语可知这里回答的是表示时间的词，所以上句的疑问词可以用when或what time，故排除C；在具体的时刻前应该用介词at，故排除B；在早晨应该用介词in，故选A。