题文
You must keep on working in the evening, you are sure you can finish the task in time.
| A．as |
| B．if |
| C．when |
| D．unless |
推荐试卷
You must keep on working in the evening, you are sure you can finish the task in time.
| A．as |
| B．if |
| C．when |
| D．unless |
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