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

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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。