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

 

本題考查名詞用法辨析。challenge“挑戰(zhàn)”符合句意。而ability“能力”，competition“競(jìng)爭(zhēng)”，knowledge“知識(shí)”均不合題意。

 

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