27. ----Can I catch a train to Beijing? ----You miss one. There are many trains to Beijing

问题补充：

27. ----Can I catch a train to Beijing?

----You miss one. There are many trains to Beijing.

A. mustn’t

B. needn’t

C. daren’t

D. shouldn’t‘

答案：

A. mustn’t

B. needn’t

C. daren’t

(答案→)D. shouldn’t‘

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