◎ 题干
An awful accident ______ however occur the other day.

[     ]

A. does
B. did
C. has to
D. had to
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“An awful accident ______ however occur the other day. [ ]A. does B. did C. has to D. had to …”主要考查了你对  【一般过去时】【强调句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。