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【题目】— Finding information is not a big deal today.

—Well, the ___________ is how we can tell whether the information is useful or not.

A.troubleB.messageC.challengeD.knowledge

【答案】C

【解析】

句意“-查询信息在如今不是一个大问题。-是的,挑战是我们能否区别这个信息是否有用”。A.麻烦;B.信息;C.挑战;D.知识。根据句意可知,表示“辨别信息是一个挑战”,故选C。

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