People still lack knowledge about what can be recycled and what cannot, especially when it comes to __________ kitchen garbage.
【选项 】
| A．sort |
| B．sorting |
| C．sorted |
| D．having sorted |
推荐试卷
People still lack knowledge about what can be recycled and what cannot, especially when it comes to __________ kitchen garbage.
【选项 】
| A．sort |
| B．sorting |
| C．sorted |
| D．having sorted |
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