小题1:C
小题1:A
小题1:A
小题1:C
小题1:C
小题1:猜测词义题：从第一段的While most of them get useful information and use the Internet to help in their studies, some are not using it in a good way.可知虽然大多数人使用网络学习和得到有用的信息，但一些人没有合理的使用它(就是网络)，选C
小题1:细节题:从第一段的句子：There’s a report on 3,375 students aged from 10 to 18 in seven Chinese cities.说明A项正确。
小题1:A细节题：从第一段的While most of them get useful information and use the Internet to help in their studies, some are not using it in a good way.可知大多数人是通过网络得到有用的信息
小题1:推理题;从最后一段的句子：It will teach students how to be a good person in the online world. It will be a guide for teens using the Internet and keep students away from bad sites.可知这本书可以教会学生怎么正确使用网络，选C
小题1:主旨题：第一段的最后两句话是主题句：Many are playing online games too much. A few even visit Web sites they should not look at. Bad things can happen if young people spend too much time on the Internet.说明网络有危险我们要谨慎。选C