Scientists in the world are expected to find a(an)______to the problem of overpopulation.

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问题 Scientists in the world are expected to find a(an)______to the problem of overpopulation.

选项 A、reply
B、solution
C、response
D、answer

答案B

解析 solution to the problem是固定搭配，介词必须用to。

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英语

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