【題目】John _____ hard for four years at a business college, and now he owns a big oversea company.

A.has workedB.had workedC.workedD.was working

【答案】C

【解析】

考查時態(tài)。句意：John在一個商學院努力學習了四年，現(xiàn)在他擁有一家大的海外公司。and前后為兩個并列句，是分別對John的過去和現(xiàn)在的闡述。根據(jù)句意，前半句話只描述John過去在大學努力學習了四年這個事實，所以時態(tài)應用一般過去時。故選C。

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