(2013·安徽蚌埠一次質(zhì)檢)Finding information in today's world is easy.The ________ is how you can tell if the information you get is useful or not.
A．knowledgeB．a(chǎn)bility
C．competitionD．challenge
D
D　句意：當今世界找信息很容易。但挑戰(zhàn)是你如何辨別你所獲得的信息是否有用。knowledge知識；ability能力；competition競賽。challenge挑戰(zhàn)，艱巨任務。又如：She likes her job to be a challenge.她喜歡艱巨的工作。
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