题文
I'm sorry you've been waiting so long, but it'll still be some time __________ Brian gets back.
| A．before |
| B．since |
| C．till |
| D．after |
推荐试卷
I'm sorry you've been waiting so long, but it'll still be some time __________ Brian gets back.
| A．before |
| B．since |
| C．till |
| D．after |
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