Question

【题目】—What time do you usually have your first class?
—_______ eight o'clock _______ the morning.
A.At; on
B.At; in
C.On; in
D.On; on

Answer 1

【答案】B
【解析】考查介词的用法。在某一时刻之前用介词at；在某一段时间前用介词in。故选B。