问题补充:
-Hi, I didn know you had come back! Have you finished your teaching in America?
-Yes. IChinese there for more than two years.
A. have been teaching
B. was teaching
C. taught
D. had taught
答案:
A. have been teaching
B. was teaching
(答案→)C. taught
D. had taught
解析:可联系答.案.网客服索取。