问题
选择题
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
答案
答案：A
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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
答案：A