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--Look!Whyaretheresomanypeople?--Therearesomepolicemen....

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问题详情:

--Look!Whyaretheresomanypeople?--Therearesomepolicemen....

--Look! Why are there so many people?

--There are some policemen. I think there ________ a traffic accident.

A. must have    B. can have            C. is going to be              D. must be

【回答】

知识点:情态动词

题型:选择题

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