Question

—The earthquake in Ya'an took place ____two past eight ____the morning of April 20^th.
—Yes, some people were still sleeping for it was weekend.

A．in ; on

B．on ; in

C．at ; in

D．at ;on

Answer 1

D

试题分析：在表示时间时,in表示在一个时间范围;at表示在具体时刻;on表示在具体某一天. two past eight是具体几点钟，故前面用介词at。the morning of April 20^th.是具体的某一天，故用介词on。选D。
点评：英语介词的一个特点是一词多义，并且介词间语义交叉现象很多，习惯用法也很多，有时很难从词义上区分开来。故学习中要注意不断总结，熟记一些介词和动词的固定搭配用法及习惯用法，是完成此类问题的捷径。