2. 外语
  3. By the late 1950s scientists had already ______ enough evidence to show a clear link between smoking and cancer.

By the late 1950s scientists had already ______ enough evidence to show a clear link between smoking and cancer.

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问题 By the late 1950s scientists had already ______ enough evidence to show a clear link between smoking and cancer.
选项 A、assembled
B、proved
C、acquired
D、accumulated
答案D
解析 语义连贯题。题干中的By表示“到某时(已发生某事或出现某种情况)”。[D]accumulated“积累”，是指经过一段较长的时间由少到多地积累，与By引导的时间短语相吻合，而且符合与evidence的搭配。 [A]assembled“集合，聚集”，是指把人们召集起来或把物品集中起来，使他(它)们成为一个整体；[B]proved“证明，证实”，是指通过提供证据来确定某事的真实性，因此，prove通常与尚未证实的事情搭配；[C]acquired“获得”，是指通过持续的努力或受环境影响而获得某种新的特征或能力，也不能和evidence搭配。
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大学英语四级

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