Question

I usually get up ( ) 7 o'clock ( ) the morning. 有三个答案 A. past, on B. at, in C. in, in

Answer 1

at 7 o'clock 七点钟
in the morning 在早上
我经常在早上七点钟起床
正确答案选 B

Answer 2

at 7 o'clock 七点钟（时点用at ）
in the morning in the afternoon in the evening (习惯用法)

Answer 3

应该选B，是固定用法。