题目内容
【题目】It will be a long time __________ we finally solve the problem of pollution.
A. before B. since C. when D. Until
【答案】A
【解析】考查固定句型It will be a long time before… 在……之后,才……。
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题目内容
【题目】It will be a long time __________ we finally solve the problem of pollution.
A. before B. since C. when D. Until
【答案】A
【解析】考查固定句型It will be a long time before… 在……之后,才……。