—I’m going to the United States.—How long you in the United States?A. are; stayedB. are;

问题补充：

—I’m going to the United States.

—How long you in the United States?

A. are; stayed

B. are; staying

C. have; stayed

D. did; stay

答案：

A. are; stayed

(答案→)B. are; staying

C. have; stayed

D. did; stay

解析：考查时态。句中用现在进行时表示将来。句意：你将在美国呆多长时间？选B。