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

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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