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  • 科目:英语
  • 题型:单选题
  • 难度:容易
  • 人气:1968

-Hi, I didn't know you had come back! Have you finished your teaching in America?
-Yes. I______Chinese there for more than two years.

A.have been teaching B.was teaching C.taught D.had taught
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-Hi,Ididntknowyouhadcomeback!H