—How long you in Singapore?—For just the weekend I’ll be back next Monday morning.A. ha

问题补充：

—How long you in Singapore?

—For just the weekend． I’ll be back next Monday morning.

A. have; stayed

B. are; staying

C. did; stay

D. do; stay

答案：

A. have; stayed

(答案→)B. are; staying

C. did; stay

D. do; stay

解析：句意：--你在新加坡呆多长时间？--就过一个周末，我到下周一早晨就回来了。根据I’ll be back next Monday morning可知将要去新加坡，stay可用进行时表示动作将要发生，故选B。