_______ , Li Lei was far behind the others at first.
| A．At 800-metre race |
| B．In the 800-metres race |
| C．In the 800-metre race |
| D．At the 800-metres race |
_______ , Li Lei was far behind the others at first.
| A．At 800-metre race |
| B．In the 800-metres race |
| C．In the 800-metre race |
| D．At the 800-metres race |
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