问题
选择题
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
答案
答案：B
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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
答案：B