There is still quite a long way to go ________ researchers can find a solution to the problem.
There is still quite a long way to go ________ researchers can find a solution to the problem.
A、before
B、until
C、so
D、where
【正确答案】:A
【题目解析】:There is still a long way to go before+分句是固定句型表示要…还有很长的路要走,离…还很遥远。此句话的意思是研究人员离找到问题的解决方法还很远。
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