Jim who is now our English teacher once ________ as a manager in an international cooperation for 5 years.
A．has workedB．had workedC．was workingD．worked
D

試題分析：考查時態(tài)。本題抓住關(guān)鍵詞once曾經(jīng)，故用一般過去時，陳述過去的事實。句意：吉姆，曾經(jīng)在一家國際公司擔當5年經(jīng)理，現(xiàn)在是我們英語老師。故D正確。
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