— What time do you usually get up in the morning?— _ six o’clock.A. On B. For C. In D. At

问题补充：

— What time do you usually get up in the morning?

— _ six o’clock.

A. On

B. For

C. In

D. At

答案：

A. On

B. For

C. In

(答案→)D. At

解析：介词的考查 。On 与具体的时间连用； for 与时间段连用；in 与时间段连用； at与时刻连用。句意：——早上你通常什么时间起床？——6点钟。