问题补充：
—I am going to America.
—how longyouthere?
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：本题考查时态。此处用进行时态表将来。
如果觉得《—I am going to America.—how longyouthere?A. are; stayedB. are; stayingC. have; stayedD. di》对你有帮助，请点赞、收藏，并留下你的观点哦！
