Cars are lots of fun, but they could also be dangerous. We have to be careful when we drive them or ride in them.
It's always a good idea to put on your seat belt when you're in a car. Why? Think about this example: You put an egg on a skateboard and give it a push. If the skateboard hits a stone, it will stop, but the egg won't. It will fly through the air, hit the ground and break.
Now, think what would happen if you tied the egg to the skateboard. When the skateboard hits a stone, the egg won't go flying; it will stay safely on the skateboard.
Volvo, a famous Swedish carmaker, was the first to use seat belts in 1849.
Air bags are also very important for car safety, because sometimes a seat belt isn't enough. If the car is going really fast and runs into something, seat belts could even hurt the people who wear them. Most new cars have air bags in front of and next to the seats. When a car hits something, its air bags will come out quickly in less than one second to keep the people inside safe.
【小题1】The passage mainly tells us                  .

Chen Weijun，13，is a Junior 2 student at Huaqiao Middle School in Haikou，Hainan．

    This week，he had the happiest time．On Tuesday，he went to the Great Hall of the People in Beijing．He and nine other kids became the Top l0 Young Pioneers．

    “Now I am not only my dad’s good boy．I am China’s good boy．I must work harder，” he said．

    At school，Chen is a good student leader．He does many activities．He was in short plays．He worked as a host（主持人）for his school TV．

    “I’m self-assured．It’s good to try different things．”Chen said．“If you can dream it，you can do it．”

    Chen’s teacher, Xie Wei, said Chen is nice and helpful．“He doesn’t talk much but works very hard．”

    Young Chen always helps other people．One student at his school，Wu Deyi，had leukaemia（白血病）．Chen asked all his classmates and teachers to help him。From February to May。Chen raised more than 20．000 yuan for Wu．

    Chen also thinks about how to make his city cleaner．There were plastic bags in the Meishe River．Chen was sad．He wanted the river to be clean．So he wrote a  letter to the head of the city．He asked him to spend more money on it．tell people  not to throw rubbish into the river and have a wall to keep children safe．The head of  the city listened to him．Now the river is cleaner．

    At home，Chen is a good boy．He washes his clothes and he also cooks meals for the family sometimes．Chen says his hero is Premier（总理）Wen Jiabao．“He is very  brave．He is not afraid of difficulties and makes China stronger，”Chen said．Will Chen become a big 1eader of tomorrow?

1．Chen Weijun is ______．

A．a college student                                    B．from Hainan Province   

      C．a senior student                                         D．not his dad＇s good boy

2．At school Chen is busy ______．

A．doing many activities                                B．helping his English teacher   

C．playing games                                            D．collecting plastic bags

3．The underlined word “self-assured” means _______．

      A．自负的                B．自满的                C．自私的                   D．自信的

4．The head of the city has spent more money ______．

A．helping Wu Deyi                                      B．cleaning and protecting the river

      C． buying new clothes for Chen                     D．building Chen’s school TV station

5．The best title（标题）for the passage would be——．

      A．A good boy who likes to help other people  B．A big 1eader of tomorrow 

C．Something about the head of the city                 D．A boy’s hero