Traveling is one of the most important activities and people have been interested in it for many years. Modern traffic develops fast, so traveling to different places has become much easier than before.

　　Staying healthy while traveling can make your trip happier.But do you know how to keep healthy during a trip？The following information may be useful for you.

　　　Before traveling：

　　●Wear comfortable shoes，a hat and sunglasses.

　　●Take some necessary medicine with you.They can be used when you get sick or have other problems.

　　●If you do lots of sports like walking or climbing during your trip，you should do some exercise for weeks or months before you leave.

　　　While traveling：

　　●Be sure not to eat dirty food or bad fruit.

　　●Have enough time to take a rest during your trip.

　　●Tap water is not safe，so drink bottled water and always clean the cover on the bottle.

判断下列句子是否与短文内容相符，相符的填“T”，不相符的填“F”。

1.Traveling has become much easier because of the modern traffic development.

2.You should wear less clothes before you leave your home for a trip.

3.You had better not be too tired while you are having a trip.

4.If you walk more and eat more while traveling, your trip will be happier.

5.The passage mainly talks about activities while traveling

Doctors are starting to worry that younger and younger students are having back and neck problems as a result of school bags being too heavy for them.

“It’s hard for me to go upstairs with my bag because it’s so heavy,” said Rick Hammond, an 11-year-old student in the US.

Rick is among students who have common school bags with two straps (带子) to carry them, but many other students choose rolling(有滚轮的) bags.

But even with rolling bags, getting up stairs and buses is still a problem for children. Many of them have hurt their backs and necks because of the heavy school bags.

But how much is too much? Doctors say students should carry no more than10% to 15% of their own body weight (重量).

Scott Bautch, a back doctor, said children under Grade 4 should stay with 10%. But it is also important that older children don’t stay with over 15%, because their bodies are still growing. “Children are losing their balance (平衡) and falling down with their school bags,” he said.

Parents and teachers are starting to tell children to only take home library books they will be reading that night. Some teachers are using pieces of paper or thin workbooks for students to take home.

One of the best answers is, as some children said, to have no homework at all!

1 From the passage we can know that_____.

A. only children in China carry too heavy school bags

B. children in other countries don’t carry too heavy bags

C. both children in China and the US carry too heavy school bags

D. only children in the US carry too heavy school bags

2 Children feel it hard for them to go upstairs because _______.

A. they are too young

B. their school bags are too heavy

C. they don’t know how to go upstairs

D. their parents don’t always go upstairs with them together

3 If a child carries a heavy school bag,________.

A. his back and neck will be hurt　　　　 B. his head and arms will be hurt

C. his hands will be hurt　　　　　　    D. his feet will be hurt

4 According to the doctor, Scott Bautch, if a child in Grade 5 weighs (重) about 30 kilos, the school bag he carries should not be over _______.

A. 5 kilos　　　　　　　　  B. 3 kilos　　　　  C. 5. 5 kilos　　    D. 4.5 kilos

5 Some students think the best answer to his problems is that_____________.

A. they should have a little homework to do after they get home

B. their teachers had better not ask them to do any homework

C. they should only take home library books they will read that night

D. they should use thin workbooks instead of thick ones