题文
__________ he took part in the competition, he won a second prize.
| A．The first time | B．For the first time |
| C．At a time | D．At one time |
推荐试卷
__________ he took part in the competition, he won a second prize.
| A．The first time | B．For the first time |
| C．At a time | D．At one time |
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