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The scientist’s many years’ careful observation ____ a surprising discovery.
A.ran intoB.began withC.led toD.came from
C
考查短语辨析。ran into 偶然遇见,began with 以什么开始,led to 导致,came from 来自,句意:科学家们许多年的细心观察导致了一个令人吃惊的发现。所以选C。
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