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Finding information in today’s world is easy. The ______ is how you can tell if the information you get is useful or not.

   A. ability        B. competition         C. challenge           D. knowledge

C


解析:

challenge意为“挑战,艰巨任务,难题”,由于我们现在正处于信息爆炸的时代,在当今时代中找到信息是一件很容易的事,但区分出这些信息是否有用的确是一个难题。ability意为“能力”。competition意为“竞赛”。knowledge意为“知识”。

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