题文
Wind power is an ancient source of energy ______we may return in the near future.(2010 ,上海)
| A．on which |
| B．by which |
| C．to which |
| D．from which |
推荐试卷
Wind power is an ancient source of energy ______we may return in the near future.(2010 ,上海)
| A．on which |
| B．by which |
| C．to which |
| D．from which |
试题篮
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