神马品牌网上原瑞穗ed2k下载:高二英语寒假作业
来源：百度文库 编辑：神马品牌网 时间：2024/05/12 19:55:26
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