An awful accident however occur the other day.A. doesB. didC. has toD. had to

问题补充：

An awful accident , however, occur the other day.

A. does

B. did

C. has to

D. had to

答案：

A. does

(答案→)B. did

C. has to

D. had to

解析：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。