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英语单选题in 2005, i was lucky enough to be the only one selected

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英语单选题
in 2005, i was lucky enough to be the only one selected from our group to look after the pandas in.I _____ there for five years and finally returned to Beijing.
A. have worked B.had worked C,worked
答案选C 为什么不能选B
英语单选题in 2005, i was lucky enough to be the only one selected
注意到连词and了吗?它前后的动词,即worked和returned是平衡关系,不是强调“时间上的前后”,所以用的是一般过去式.要是用B的话,是“过去完成时”,那样这句话应该改成 I had worked there for five years before I ret...