题文
Although the lecture had already been on for five minutes,I was still not able to find a chair___
| A．to sit |
| B．for to sit on |
| C．to sit on |
| D．for sitting |
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Although the lecture had already been on for five minutes,I was still not able to find a chair___
| A．to sit |
| B．for to sit on |
| C．to sit on |
| D．for sitting |
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