2. 外语
  3. They have taken measures to solve the city’s pollution problem, but it may be some time ______the situation improves.

They have taken measures to solve the city’s pollution problem, but it may be some time ______the situation improves.

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问题 They have taken measures to solve the city’s pollution problem, but it may be some time ______the situation improves.
选项 A、before
B、for
C、unless
D、since
答案A
解析 他们已采取措施解决城市污染问题，但要使情况好转，还需要一段时间。It may／will be some time before…意为“要…还需要等一段时间”。
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D类竞赛（专科）

大学生英语竞赛（NECCS）

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