英语选择题-What time do you usually get up ,Rick?-I usually get up __ five o'clock.

英语选择题-What time do you usually get up ,Rick?-I usually get up __ five o'clock.
-What time do you usually get up ,Rick?-I usually get up __ five o'clock.
A.in B.at C.on D.for 请问时间是选的 象这种 把握不大 是C吗