---- We’re leaving for Hainan the day after tomorrow.
---- Wow, have a good trip. And by the way how long there?
A. have you stayed
B. are you staying
C. had you stayed
D. did you stayed
网友回答
A. have you stayed
(答案→)B. are you staying
C. had you stayed
D. did you stayed
解析： 考查时态：句意：--后天我们要去海南。--哦，旅途愉快，顺便问一下，你们要呆在那里多久？，因为还没有去，呆在那里是将来的动作，用现在进行时表示一般将来时，选B。