A study reported: using a computer at home may be bad for a child's performance in math, science and English. It can't improve them. Children are spending more time chatting   , playing games or sending and they aren't doing their homework. Li Jun, Hunan Now more and more people are buying and selling things on the Internet. Hackers around the world are interested in this. They often break in your system, but it's very difficult to find them. They even can take your money out of the bank. Xiao Yu, Guangdong I'm a 14-year-old girl in Tibet. The Qinghai-Tibet Railway was built in 2006. I can reach Beijing by train in about 48 hours. I can often go to visit my grandpa. Joma, Tibet I'm 13 years old. I want to invent a machine. My machine will _ the earthquake better and make people run to safe places. Lin Yan, Sichuan People in Tibet can get to Beijing   _   in about 48 hours now.
by train by bus by plane by subway