题目内容

I am sorry you’ve been waiting so long, but it will still be some time __________ Brain gets back from his holiday.
A．sinceB．beforeC．tillD．after
B

试题分析：句意：抱歉你等了这么长时间，但是，Brian度假回来还得一段时间。It +be +一段时间+before从句，肯定句翻译为：要多久才….如：It is going to be some time before I recover my full strength. 还要一段时间我才能完全恢复体力。故B正确。
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