－Hi I didn't know you had come back! Have you finished your teaching in America?－Yes. ICh

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。