题文
He __________ on the farm for twenty years and now he is a teacher.
| A．has worked |
| B．had worked |
| C．worked |
| D．works |
推荐试卷
He __________ on the farm for twenty years and now he is a teacher.
| A．has worked |
| B．had worked |
| C．worked |
| D．works |
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