Mr. Smith works as a government official now, but he in a middle school for 5 years.A. h

发布时间：2020-08-16 13:49:21

Mr. Smith works as a government official now, but he      in a middle school for 5 years.
A. has worked
B. worked
C. had worked
D. had been working

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A. has worked
(答案→)B. worked
C. had worked
D. had been working
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