题目内容
He _____ in this factory for 20 years already.
| A．will work | B．works |
| C．has worked | D．is working |
C
解析试题分析：句意：他已经在这家工厂工作20年了。结合语境可知本句描述的是从过去一直持续到现在的动作，故用现在完成时态。选C。
考点：考查时态辨析
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