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I first met Lisa three years ago. She at a radio factory at the time. [ ] A.has

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I first met Lisa three years ago. She at a radio factory at the time. [ ] A.has

I first met Lisa three years ago. She ________ at a radio factory at the time.

[]

A.has workedB.was workingC.had been workingD.had worked

试题答案

答案:B

解析:

根据上下文我们可推测为这里指的是“三年前的”情况,表示“当时他正在一家无线电厂工作”。