His father ________ in the factory since he was twenty. A．works B．has worked C．will work
Hisfather________inthefactorysincehewastwenty.A．worksB．hasworkedC．willworkD．wasworkin...
His father ________ in the factory since he was twenty. A．works B．has worked C．will work D．was working
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| B |
| 根据时间状语从句从他二十岁，可知主语为现在完成时态，选B. |
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