D．the second man's companions weren't involved in the arguments

　　解析：　细节理解题。由文章最后一段可知，在火车上经历的这件事使得作者心中充满了希望。

　　答案：　B

　　4．Which of the following shows the correct order of the event?

　　a．The second man entered the carriage.

　　b．The teenager slept on the floor.

　　c．I found the hope of our nation.

　　d．The train reached Palakkad.

　　e．The second man said no to the ticket examiner.

　　A．bcade B．adceb

　　C．dbaec 　　 D．daebc

　　解析：　细节理解题。根据整个事件发展的顺序可以看出，D项是正确的。

　　答案：　D

　　 Most parents in Britain log onto social networking sites like Facebook to spy on what their children are doing，a study has found.Figures showed that nearly 55% of parents thought of snooping_around on their children' s profiles (基本信息) to see what they are up to.They did it to avoid having "awkward conversations" with the children but nearly a quarter admitted it was the only way they could find out about their lives.

　　Websites like Facebook and MySpace along with microblogging site.Twitter have become popular among teenagers and children.Figures from the Office for National Statistics show that last year among 16 to 24­year­olds,75% posted messages on them.The majority of 13 to 16­year­olds have more than 100 "friends" on Facebook while more than 750,000 are using the website below the age limit，which is 13.

　　Experts and parents however have expressed anxiety about how they can monitor what the young are up to when they go online.Almost one in 20 mothers and fathers even log on with a friend's account to avoid detection and gain better access to their children's profiles.

　　While 55% said they did spy on their children,40% said they did not，but the remaining 5% said they would do if they knew how.

Some 41% monitor their children's status updates and 39% look at their "wall"，which is