问题
选择题
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
答案
答案：B
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……”。