---How long in Shanghai?- For two weeks. I’m going to visit some schools in Shanghai.A

问题补充：

---How long in Shanghai?

--- For two weeks. I’m going to visit some schools in Shanghai.

A. did you stay

B. are you staying

C. do you stay

D. have you stayed

答案：

A. did you stay

(答案→)B. are you staying

C. do you stay

D. have you stayed

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