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
网友回答
(答案→)A. before
B. since
C. till
D. after
解析:
句意:对不起,让你等了这么长时间,但是,Brian还要过一段时间才能回来。本题应注意句型:It will be+一段时间+before从句,意为“要过多久才……”。