请你阅读短文，并选择适当的单词填空。

It’s the year 2050 now. Life is very different from life in 2011. There are more people and cars in the world．It’s more 1. ________________ for people to find a job．And it’s also more difficult for people to ride in the streets．Most people live 2. ________________ because they eat healthier food. Nobody eats meat very often 3. ________________ more and more people know it’s important to have a healthy diet. They eat more 4. ________________ and fruit. They don’t have to work long hours. They can surf the Internet at home. They also have more free time for sports and 5. ________________ for a trip.

单词拼写（共10小题，计10分）
根据下列句子及所给单词的首字母，在答题纸上按题号写出各单词的完全形式（每空限填一词）。
【小题1】My father often goes to Shanghai. He is there on b______, not for travel.
【小题2】Among all the Junior Three students, some students have c______ to be recommended students to go to high schools, but most of students will go on working hard for their ideal schools.
【小题3】F______ 14^th is Valentine’ s Day.Adults often send roses and chocolate to their loved ones.
【小题4】Zhao Wei, one of the most famous actresses in China ,was born in 1976,but in her t______, she directed a movie named For Youth .
【小题5】H7N9 avian influenza is very d______, and some people have been dead because of it.
【小题6】The number of p______ in this primary school is getting bigger and bigger because there are more and more people coming to live around the school.
【小题7】 A______ the one-hundred-year- old man GuanYinghan from Shenyang is not very rich , he has donated more than 100,000 yuan to Committee of the Red Cross to help others.
【小题8】Thanks to the useful invention--mobile phone, people can send m______ and communicate with others easily.
【小题9】My neighbors moved to another city .They took away most of their things ,so the room was n______empty.
【小题10】Lily does her homework most c______. She hardly makes mistakes.

Differences in bicycling between China and other countries
People all over the world ride bicycles . But there are many differences between China and other countries .
Wearing helmets(头盔)
You may think  helmets  are useless .But you are wrong . In many places kids have to wear them when they ride bikes . In some places of the United States , it's against the law (违反法律）for kids under 16 to ride without  helmets  .Many people say that helmets are like seat belts (安全带） for bikes .
Bike lanes (车道）
In China , bicycles have their own special lanes on the road . People can ride next to cars . In the USA , roads are only for cars . People don't ride their bikes to school or work . But this isn't true everywhere in the West . In the Netherlands(荷兰）there are more bikes than people . The whole country has bicycle lanes .
Riding for fun
Do you ride your bike to school ? In China this is very common . But in the USA , kids only ride their bikes for fun on the weekend . They regard bicycling as a sport . Many cities have special parks .People turn old railways(铁路） into bike roads . People can ride from town to town  .
【小题1】What are  the differences between China and other countries in bicycling ?
_________________ are the differences between China and other countries in bicycling .
【小题2】Which country has the law that everyone must wear a helmet while riding ?
____________ has the law that everyone must wear a helmet while riding  .
【小题3】What do many people think of helmets  ?
They think that helmets are  _______________ for bikes .
【小题4】Which country has more bikes than people ?
__________________________ there are more bikes than people  .
【小题5】What do Americans regard bicycling as and how do they do  ?
They regard it as  __________ ; they build some special  _________ and turn  __________ into bike roads .

Recent research from the Pew Internet Project suggests that 90% of Americans aged from 12 to 17 use the Internet, and 51% of those teens use social networks. However, there are many possible problems with social networking sites and the teenagers who use them.
Apart from the social advantages, social networking sites can be used to record school research, develop artistic talents and experiment with other forms of subject creation. They provide a way to communicate with others who share the same interests and to get helpful advice on ongoing projects.
Along with these advantages come some dangers. For example, most social networking sites are open to all, especially MySpace, which is the most popular social network among teens in America. It means that they could be put in unpleasant and frightening situations.
A greater danger is that teens may become objects of the people with secret purposes. The secrecy of some social networking sites makes it easy for dangerous people to find young teens and invite them into dangerous conversations. It’s easy for them to pretend as teens and draw children into dangerous real-world communication as well. Then further hurt might be on its way.
Another danger is identity stealing, which can happen when teens share too much information about their names, dates of birth and locations.
Therefore, it’s very important to make sure teens are safe when they use social networks.
Many of the same rules that work for online chat work for these sites:
※ Don’t use your real name.
※ Don’t give out personal information to people you don’t know. A last name and a town are enough for a bad guy to find where you are.
※ Don’t believe that people are who they say to be.
※ Immediately end any communication that makes you uncomfortable and report it to a parent.
Only if you are sure of your safety, can you enjoy the fun brought by social networking. Besides, trying to deal with all problems on your own can lead to terrible results. Remember, asking your parents or school officials for help doesn’t mean you are unable to do anything but wiser than many others.                                             
【小题1】How many dangers of using social networks are mentioned in the passage?