Question

An awful accident __________, however, occur the other day.

A．does

B．did

C．has to

D．had to

Answer 1

B

试题分析：句意：然而，几天前确实发生了一件可怕的事情。这里是强调谓语，用助动词+动词原形，因为时间是the other day“几天前”，用一般过去式，所以用助动词did，选B。