问题补充：
—Your spoken English is so good. Have you been abroad?
—Yes. I in London for two years.
A. have stayed
B. stayed
C. had stayed
D. have been staying
答案：
A. have stayed
(答案→)B. stayed
C. had stayed
D. have been staying
解析：
这题考查时态：根据句意：你英语很好，你出过国吗？--是，我在伦敦呆了两年。说明在伦敦的两年是过去的两年。用过去时，选B。
