题目内容
18．Today's world is very unsafe for children．We all listen to news of child abduction everyday on TV and feel concerned about the safety of our children．So，it is necessary for parents to know about the methods of protecting children from illegal elements and criminals．GPS tracking system comes in handy for such a purpose and gives a sigh of relief to the worried parents．With the help of GPS child tracking device you can locate your child easily at any time．GPS child tracking system is also very helpful for watching the activities of teenagers．This age is called the most risky age，as in this age it is very easy to attract child towards effortless shortcut ways of achieving success．money etc．Bad-intentioned people try to misuse the innocence of children．With the GPS child tracking system，you can keep a watch on your child and prevent him from falling in bad company．
A less than 2inches square device，it is very easy to operate and doesn't need much technical expertise（专门技术）．You can put it in the backpack of your child．With this device，you can keep a watch on your child 24hours via your personal computer．If you witness some threat or if the child feels some danger in any situation，he can press the SOS button．The device is easily rechargeable and battery runs 18～24hours after each recharge．
28．What does the word"abduction"in the first paragraph refer to？C
A．Being followed by GPS．
B．Being faced with failure．
C．Being taken away illegally．
D．Being disappointed with unsafety．
29．Why are teenagers at the most risky age？B
A．They are not fully aware of the danger．
B．They want to get immediate success or quick money．
C．They don't know how to protect themselves．
D．They don't know how to succeed or get money．
30．What can children with GPS do if they are in danger？A
A．Press the SOS button．
B．Call their parents immediately．
C．Send a message to local police．
D．Send a signal to the computer at home．
31．What is the passage mainly talking about？C
A．Dangers teenagers face today．
B．The use of GPS in everyday life．
C．How GPS can keep teenagers safe．
D．Why parents should own GPS．
分析 本文讲述现在孩子遇到很多的安全问题，GPS跟踪系统可以让家长在电脑上了解孩子的情况，如果孩子遇到危险可以按求救信号
解答 28．C．推理判断题．根据第一段提到Today's world is very unsafe for children．We all listen to newsof child abduction everyday on TV and feel concerned about the safety of our children．So，it is necessary for parents to know about the methods of protecting children from illegal elements and criminals．现代社会对于孩子来说很不安全，我们会在电视上看到很多关于孩子被带走的新闻，十分担心孩子的安全，因此有必要了解些保持孩子免受非常非犯罪的伤害，故选C项．
29．B．细节理解题．根据第二段提到GPS child tracking system is also very helpful for watching the activities of teenagers．This age is called the most risky age，as in this age it is very easy to attract child towards effortless shortcut ways of achieving success．money etc可知青少年时期是个很危险的年纪，很容易成功和得到钱，故选B项．
30．A．细节理解题．根据最后一段提到If you witness some threat or if the child feels some danger inany situation，he can press the SOS button．如果遇到危险孩子可以按求救按钮，故选A项．
31．C．题主旨大意．根据第一段We all listen to news of child abduction everyday on TV and feel concerned about the safety of our children．So，it is necessary for parents to know about the methods of protecting children from illegal elements and criminals可知本文讲述现在孩子遇到很多的安全问题，GPS跟踪系统可以让家长在电脑上了解孩子的情况，如果孩子遇到危险可以按求救信号，故选C项．
点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．
