Noise pollution is doing much harm to our health now. Noise，in fact，is unwanted sound and is a kind of invisible (无形的) killer. More and more students enjoy listening to music very much. When they listen to MP3 players, they like to turn up the volume (音量). Some people love listening to loud music. Furthermore, while watching TV, they keep the volume up. But they haven't realized that the noise is weakening their hearing. In fact, the noise not only influences each member in the family, but also makes a difference to the comfort of neighbors.

    Noise pollution is a source of increasing misery (痛苦) to people in our society. If people are often disturbed by it, they may feel uncomfortable or upset. What's worse, the noise can make people mad sometimes. If a worker works in a printing factory for too long, his/her hearing loss is much faster than a common person working in a quieter environment. So everybody must pay more attention to noise pollution. Generally speaking，the following four types of noise should be watched out for：

    Noise in the street

    Construction site (建筑工地) noise

    Noise at work

    Transportation noise

    I think the local department (部门) should take measures to control the noise levels, but it's everybody's duty to keep a quiet environment.

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    Maybe you know floods, earthquakes, sandstorms and so on. But did you hear of typhoons(台风)?

    Typhoons are some of the worst storms, usually around the Pacific Ocean（太平洋） and the South China Sea. Most happen in July, August and September.

    How does a typhoon happen? When lots of sea water gets hot in the summer sun, it evaporates （蒸发）into the air. This makes the air hotter. When the air gets warm enough, it starts to move higher up into sky. Then cooler air around it rushes in. It fills the space that is left. After the air gets warmer, it starts to move quickly, making wind. The wind goes in circles（圆圈）and it keeps moving higher in the sky. The warmer the air gets, the quicker the wind moves. And when the wind moves faster than 30 meters a second, a typhoon begins.

    A typhoon has two parts, one is called the “eye”. In the eye, the wind does not move so fast. The other part is the wall of clouds around the eye. Here are the strongest winds and hardest rains.

    Typhoons are very dangerous. In November this year, Typhoon Haiyan killed 5500 people in Philippines. More people are missing（消失）.

    What to do when a typhoon hits（袭击）?

⒈Stay inside. Close all the windows and stay away from them.

⒉Try to bring all of your things inside. Strong winds could even blow away your bikes!

⒊Listen to the radio or TV for important information.

⒋If you're told to go to a safer place, do it right now.

Every year, 340 million birds are killed on roads in the US. 335,000 European hedgehogs (刺猬) are killed on roads in the UK. When driving down most highways and sometimes also on roadways in cities, animals are hit by cars or other vehicles (车辆) by accident.

A recent study showed, for the first time, the fast-developing road network is badly influencing on animals in cities in China. Li Zhongqiu and his team from Nanjing University looked at the problem and started the research. First, they chose Nanjing as the study subject. A total of nine roads were chosen for the research, including three national highways, with over 224.27 kilometers long. Then the researchers kept an eye on the roads every two weeks over a year. The team recorded a total of 293 road kill cases. Birds made up nearly half the total. Cats, dogs and blackbirds were the three most commonly killed animals. "This may be due to the large number of homeless cats and dogs in cities," Li said. Also, there are usually a large number of blackbirds in eastern China, and they can be attracted by flies or other insects, leading to further accidents.

Roadkill happens more often in November and January, the team found. This may be due to the fact that some warm-blooded animals have to go out and search for food during these times when food is harder to find. The researchers call on policymakers to develop some traffic and animal protection rules, such as speed limits and traffic controls. And they think to build special roads for animals is a good way. These are four "life passages" for animals used in some countries.
 

Tunnel	Bridge	Viaduct (高架桥)	Canopy (树冠的) crossing

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Spider monkeys are New World primates(灵长类). They get their names because they have very long limbs(四肢) and tails, which make them look like spiders. They are often seen with their limbs on different branches.

Spider monkeys can be in tropical forests of Central and South America, from southern Mexico to Brazil. They are 35 to 66 centimeters long and weigh 13 to 26 pounds. They have long tails that they use to catch tree branches, kind of like a 5th hand.

Spider monkeys live in groups. One group usually has dozens of spider monkeys. They communicate with each other through screeches (尖叫声). At night, spider monkeys break off into smaller sleeping parties of about half a dozen or fewer. Unlike many other primates, males (雄性) stay together throughout their lives with the females. They leave their first groups to find another group.

When they go out to look for food, spider monkey groups take separate actions in order to avoid competition for it. They mainly eat fruit and nuts. They also eat other things like insects, honey, leaves, spiders and bird eggs. Spider monkeys actually play an important part in the spreading of seeds throughout the South American rain forests. Enemies that they need to keep an eye out for include animals like lions and crocodiles.

Spider monkeys are dying out. Woodcutting, which leads to the loss(丧失) of their natural living places, is playing a big role in their loss. These monkeys are also hunted for food, or to sell as pets. Spider monkeys are actually one of the most popular monkey pets around because of their look and their behavior. We must do something to protect them. After all, such good and interesting monkeys should live with humans for many years to come.

要点: 

1. 多吃水果和蔬菜，它们含有大量的维生素（vitamins）；

2. 多做一些放松的事情，例如: 听音乐、看电影；

3. 多和父母沟通，他们有更多经验。