3．How to protect children Web fans from unsuitable material on-line while encouraging them to use the Internet has long been discussed in the US．
For some parents，the Internet seems like a jungle，filled with danger for their children．But jungles contain wonders as well as dangers and with good guides，some education and a few precautions （预防），the wilds of the Internet can be safely navigated （航行）．"Kids have to be on-line．If we tell our kids they can't be allowed to surf the Internet，we're cutting them off from their future，"said an expert．
Most kids have started to use search engines．Many of them are great for finding tons of interesting Internet sites，and they can also locate places where you might not want your kids to go．There are search engines designed just for kids．A certain software contains only sites that have been selected as safe．The most popular way would be to use what is known as a"content screener （过滤）"．But this can't be wholly reliable（可靠的），and the best thing parents can do is to talk to their kids and let them know what is Ok or not OK to see or do on the Internet．Another way is that mum or dad is nearby when the child is surfing the Internet．
A few other tips：
●Don't put the PC in a child's room but keep it in an area where mum or dad can keep an eye on things．That also makes the Internet more of a family activity．
●Ask your child what he or she has been doing and about any friends they make on-line．
●Tell your child not to give on-line strangers personal information，especially like address and phone number．
●And tell your children never to talk to anyone they meet on-line over the phone，send them anything，accept anything from them or agree to meet with them unless you go along．
39．What is the main subject about the passage？C
A．Opposing children's going on-line．
B．Internet in America．
C．American children going on-line．
D．Appreciating the Internet．
40．Which of the following is right according to the passage？D
A．Surfing the Internet is the best way of educating children．
B．Using a content screener is most reliable for keeping children having ways to the Internet．
C．Searching engines can replace parents to select materials fit for them．
D．Children's not having chances to go to the Internet may block（阻止） their progress．
41．According to the passage，we can infer thatB．
A．softwares fit for children want programming
B．the Internet contains a lot of harmful sites
C．the Internet will develop better
D．a child who is on-line is in danger．
分析 本文是一篇科教类阅读，文章主要讲述了因特网对孩子既有利也有害．由此告诉父母们应该如何去保护他们的孩子免受不良网站的侵害，以及如何让孩子远离那些不健康的网络资料．
解答 39----41 C D B
39．C主旨判断题．文章的第1段就是主题句．根据第一段How to protect children Web fans from unsuitable material on-line while encouraging them to use the Internet has long been discussed in the U．S．可知在鼓励那些爱好上网的孩子利用网络资源的同时怎样避免他们接触到网上的不良内容，这个问题在美国已经讨论了很久．由此可知，本文的主题是：美国孩子上网．故选C．
40．D理解判断题．从文章内容来看，A、B、C三项明显与题意不符．根据第二段If we tell our kids they can't be allowed to surf the Internet，we're cutting them off from their future．可知如果我们不允许我们的孩子上网，我们或许正在阻碍他们的未来．故选D．
41．B推理判断题．根据第三段Most kids have started to use search engines．Many of them are great for finding tons of interesting Internet sites，and they can also locate places where you might not want your kids to go．可知很多孩子已经开始使用搜索引擎．他们发现了一些有趣的网站，但父母并不希望他们去浏览这些网站．由此推知，因特网可能包含一些不好的网站．故选B．
点评 本文考察学生的理解推断能力以及细心程度，只要抓住文章的关键词，采用寻读的方法查找细节，就能找到正确答案．
