He works as an engineer now, but he _____ on a farm for three years.A．has worked
题型：不详难度：来源：
He works as an engineer now, but he _____ on a farm for three years.| A．has worked | B．worked | C．was working | D．had worked |
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答案
| B |
解析
试题分析：句意，他现在是一名工程师，但是他在农场工作了三年。根据句意，我们知道他现在不在农场工作了。所以在农场工作的事是发生在过去的事了。所以应该用一般过去时态，选B。
点评：本题考查的是根据上下句的意思确定出正确的时态，难度不大。A选项和D选项有一定的迷惑性，但也很容易分辨：has worked表示从过去某一时间点一直持续到现在，但题干中已经说明“他”已经不在农场工作了，所以A项错误；had worked表示过去曾经，好像符合题意，但前半句用的 |
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