---I’m going to Britain？---How long you in Britain?A. did; stayB. are; stayingC. have; s

问题补充：

---I’m going to Britain？

---How long you in Britain?

A. did; stay

B. are; staying

C. have; stayed

D. are; stayed

答案：

A. did; stay

(答案→)B. are; staying

C. have; stayed

D. are; stayed

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