They have taken measures to solve the city’s pollution problem, but it may be so

游客2024-08-22  10

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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