题文
If you ask the fast runner to set the pace，then most of them will be left________.
| A．alone |
| B．behind |
| C．back |
| D．out |
推荐试卷
If you ask the fast runner to set the pace，then most of them will be left________.
| A．alone |
| B．behind |
| C．back |
| D．out |
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