I'm sorry you've been waiting so long, b...

I'm sorry you've been waiting so long, but it'll still be some time _______ Sundance gets back.

A．until

B．before

C．after

D．since

B 【解析】本题考查状语从句的用法。句意为:对不起让你久等了，但是还得再过一段时间Sundance才回来。故空格处须用before表示“在……之前，直到……才……”。

考点分析：

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