Tony ________ for the company as an engineer for two decades. Now he teaches mec

题干

Tony ________ for the company as an engineer for two decades. Now he teaches mechanics in Peking University.

A．has worked

B．worked

C．is working

D．had worked

上一题下一题 0.64难度单项选择更新时间:2013-05-19 02:02:38

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