He (work) ______on the farm for five years before he went to the college.had wor

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问题 He (work) ______on the farm for five years before he went to the college.

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答案 had worked

解析根据题意，他上大学这件事发生在过去某个时间，那么谈到在此之前的他在农场工作的事情。自然要用过去完成时，即had done sth．的形式。

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