问题补充:
—How long in America?
—Two years. I came back last month.
A. have you studied
B. do you study
C. would you study
D. did you study
答案:
A. have you studied
B. do you study
C. would you study
(答案→)D. did you study
解析:考查时态:句意:--你在美国学习多久了?--两年了,我上个月回来的。说明在美国学习的两年是过去的时间。选D。