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I once on a farm for six years．But now I’m a teacher and I for two years． [ ] A．

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I once on a farm for six years．But now I’m a teacher and I for two years． [ ] A．

I once ________ on a farm for six years．But now I’m a teacher and I ________ for two years．

[]

A．worked; have worked

B．have worked; have worked

C．had worked; have worked

D．worked; work

试题答案

答案：A

提示：

通过once(曾经)可知，前一时态应为过去时，而后一句中的for two years则是完成时的标志。

标签：sixyearsbutforonce

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