Tony for the company as an engineer for two decades. Now he teachesmechanics m Peking University.A．has worked B．worked C．is working D．had worked 题目和参考答案——青夏教育精英家教网—

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Tony ____ for the company as an engineer for two decades. Now he teachesmechanics m Peking University.

A．has worked

B．worked

C．is working

D．had worked

解析试题分析：考查动词的时态。句义：唐妮在这个公司做工程师做了20 年，现在她在北京大学教力学。前句是说明她的过去的工作经历，后句是说明她现在的工作。所以前句应该用一般过去时，所以B正确。
考点：考查动词的时态。

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