Before joining the Department of Defense, Mr. Panetta _______ as director of the CIA from February 2009 to June 2011.
A.would serve | B.served | C.was served | D.had been served |
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Before joining the Department of Defense, Mr. Panetta _______ as director of the CIA from February 2009 to June 2011.
A.would serve | B.served | C.was served | D.had been served |