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

题目简介

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

题目详情

Mr. Smith works as a government official now, but he ____________ in a middle school for 5 years.
A.has workedB.workedC.had workedD.had been working
题型:单选题难度:偏易来源:不详

答案

B

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