摘要：12．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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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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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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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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