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The biggest challenge weall face is to prevent further environmental disasters. We ________ take action before it is too late.

  • A.can
  • B.must
  • C.may
  • D.might
答案: B
本题解析:

句意:我们面临的最大挑战是防止进一步的环境灾难。我们必须采取行动,否则就太晚了。

考查情态动词。can能,会;must必须;may可能;might可能。根据“The biggest challengewe all face is to prevent further environmental disasters.”可知,问题比较严重,所以必须采取行动。故选B。

更新时间:2022-04-24 17:39
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