Theof surfing the Internet is how you can tell whether the information is true or not.A. a

问题补充：

Theof surfing the Internet is how you can tell whether the information is true or not.

A. ability

B. competition

C. challenge

D. knowledge

答案：

A. ability

B. competition

(答案→)C. challenge

D. knowledge

解析：考查名词辨析。句意“上网伴随的具有挑战性的问题是怎样分辨信息是否是真的。”A“能力”；B“竞争”；C“挑战，怀疑”；D“知识”。故选C。