◎ 题干

15. An awful crash between an express train and a bus _____ , however, occur the other day in Russia.
A. does    B. did     D. has to     D. had to
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“15. An awful crash between an express train and a bus _____ , however, occur the other day in Russia.A. does B. did D. has to D. had to …”主要考查了你对  【一般现在时】【将来进行时】【过去完成进行时】【过去将来时的被动语态】  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。