Question

【题目】Classes start ___ 8:00 ___ the morning.

A. at, in B. on, on C. at, on D. on, in

Answer 1

【答案】A

【解析】试题分析：句意：课在早上8点开始。具体到某一时刻前用介词at；在早上用in the morning。故选A。