An awful accident __,however,occur the other day正确答案是:did,为什么啊,

问题描述:

An awful accident __,however,occur the other day
正确答案是:did,为什么啊,

肯定句一般不需要助动词
特意加上助动词是为了强调
however是插入语 不用管
An awful accident did occur the other day