（2015•江苏扬州）——Finding information is not a big deal today.—— Well, the ______is how we can tell whether the information is useful or not.

题型：单选题题类：真题难易度：普通

——Finding information is not a big deal today.—— Well, the ______is how we can tell whether the information is useful or not.

A、courage B、message C、challenge D、knowledge

举一反三

― Sorry, we won't do that again.

—Yes. You must keep it well because you have to hand it in when you attend high school.

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