查人人中国名人网清明上河图 箜篌:高二英语寒假作业
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/06 08:02:47
An awful accident _____, however, occur the other day.
A. do B. did C. has to D. had to
原因
A. do B. did C. has to D. had to
原因
把插入however语去掉就明显了:An awful accident did occur the other day.
did 在这里只是表示强调“确实发生”,后面接动词原形。the other day 说明要用do的过去时
B
上面的人说的很对