How long in Beijing?- For just the weekend. I’ll be back for work next Monday morn

问题补充：

--- How long in Beijing? --- For just the weekend. I’ll be back for work next Monday morning.

A. have you stayed

B. are you staying

C. did you stay

D. do you stay

答案：

A. have you stayed

(答案→)B. are you staying

C. did you stay

D. do you stay

解析：考查将来时的表达法。句意：—你要在北京待多久？—只待周末。下周一就回来上班。本题用进行时代替将来时，表示按照计划安排要做的事情，而且动词也是表示位置变化的stay。故B正确。