题目内容
(2010·吉林实验中学高三第二次模拟) 36. Measures have been taken to solve the problem, but it may be some time ____ the situation improves.
A. since B. when C. unless D. before
D
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题目内容
(2010·吉林实验中学高三第二次模拟) 36. Measures have been taken to solve the problem, but it may be some time ____ the situation improves.
A. since B. when C. unless D. before
D