Before joining the Department of Defense, Mr. Panetta _______ as director of the CIA from February 2

题目简介

Before joining the Department of Defense, Mr. Panetta _______ as director of the CIA from February 2

题目详情

Before joining the Department of Defense, Mr. Panetta _______ as director of the CIA from February 2009 to June 2011.
A.would serveB.servedC.was served D.had been served
题型:单选题难度:中档来源:不详

答案

B
考查时态。根据本句的时间状语:from February 2009 to June 2011说明在过去的时间发生的事情,使用过去时即可。Serve没有被动语态。故B正确。

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