We often find that weekends and holidays feel so short while classes and work feel so long. Actually, though, we know that this is not true. But we still wonder where that strange feeling comes from.

    In fact, this is one of the ways that we're tricked by time, according to the website. All that S interesting. The website lists several wrong impressions (印象) we often have about time. Let's have a look.

    First of all, emotions affect (影响) our time-keeping abilities. Negative emotions (消极情绪). especially anxiety and boredom, make time seem longer because they make us concentrate (集中) more on the passage of time. However, when we are enjoying ourselves, we pay more attention to what we are doing and are likely to lose track of (失去对……的意识) time.

    Here is another example. In 2007, a group of scientists carried out a test. In the test, people fell 50 meters into a safety net and were then asked about their experience. Although the experience took shorter than 3 seconds, the people thought it was much longer than it actually was.

    This is because of the way our bodies reply to danger, according to the scientists. Our bodies produce a chemical called adrenaline (肾上腺素) when we are faced with danger. It allows us to concentrate better so that we can stay alive. As a result, we are able to remember far more details (细节) over a short period of time, which makes it seem like time is going more slowly.

    Another situation when we make mistakes about time is when we take afternoon naps (午觉). Have you ever had trouble telling what time it is after a long nap? That's because the best amount of time for a nap is 20 minutes. After 20 minutes, you enter a new stage of sleep called slow-wave sleep. If you wake up mid-way in this stage, it will take a while before you can correctly perceive (感知) time again.

    Yes, time can be mysterious (神秘的) and there is no way to control it. So, perhaps the best thing to do is to make good use of every minute.

You must know drug detection dogs*, they always help police a lot. But how about"drug detection squirrels"? Recently, Chongqi ng police have successfully trained* six squirrels to detect drugs. They began their work in early February.

claws Squirrels have a good sense of smell. They can smell food 30 centimeters* under snow. Being so small, they can find drugs in places where dogs may not be able to reach, such as in small or high places. The squirrels are able to use their claws to scratch at boxes to tell the police if they detect drugs, according to Chongqing police.

How to train different kinds of animals? First, the animals need to know the drug's smell very well. The trainers can put pieces of cloth with the drug's smell next to the animals' food. Next, the animals learn to search for the drug in different places, such as from a large number of bags or among people walking in crowds. If the animals successfully detect the drug, the police will"pay"them with food. After training for some time, the animals will have the conditioned reflex and they will be good at looking for drugs.

Ahh…aaahhhhchooo! That sneeze(打喷嚏) is uncovered, and the

germs(细菌) fly through the air. But have you ever wondered about the germs in your body? They are small organisms(有机体) that live inside us. {#blank#}1{#/blank#}It's impossible to keep them out of our bodies. They are so tiny that we don't even know they are coming inside our bodies. Only when we begin to feel uncomfortable, we know they have made us sick.

{#blank#}2{#/blank#}They come out in a sneeze, a cough, or a breath. They can also be spread by saliva(唾液), sweat(汗液), or blood.{#blank#}3{#/blank#}For example, a person may touch his or her nose and then touch a tap in a public restroom. If someone else touches that tap right away, he or she may pick up these germs.

How can you protect yourself from germs? Washing your hands is the most important way. Soap and water are germs' enemies.{#blank#}4{#/blank#}This is why it's so important to wash your hands often, and you'd better wash the hands for about twenty seconds every time.

{#blank#}5{#/blank#}This means getting enough rest and not being too tired. It also means eating good foods and exercising.  These are germ-fighting secrets!

A. They wash germs away.

B. Staying healthy also keeps germs away.

C. Germs are usually spread through the air.

D. Sometimes, they come from touching something.

E. Germs are alive and they can cause us to get sick.

The polluted 1 you're breathing could be slowly killing you, according 2 the World Health Organization, about 3 people die young from the polluted air every year. Air pollution is a huge problem for us all.

Smog is a combination(组合) of fog and smoke. PM2.5 is one of the 4 parts of smog, and it 5 the greatest r isk to human health. Beijing is one of the worst polluted 6 in China . It is said that only five days were not covered by heavy sm og in Beijing in the whole 7 of January in 2013. Its concentration(浓度)reached a record high of 993 on January 12, almost 50 8 the World Health Organization's standard.

9 smog can happen in any busy city, it's a particular problem in places such as Los Angeles,Smog becomes serious across China, especially in Beijing, largely 10 the high traffic levels, the large amount of coal burning, and the low quality of gas(汽油).

The sm og has made people in Beijing worry about their 11 . Many are choosing to travel out of the city 12 the thick smog, while others are buying air purifiers (空气净化器)to make indoor air clean. When the air is harmful, the government suggests people avoiding outdoor 13 . Officials have also closed some factories and ordered some government cars off the road. And they have made rules to stop new cement(水泥) and steel factories 14 opening.

All of us should play a part to 15 the environment for ourselves and our children. Also, the government should make rules to stop pollution.

Children in the United States think that the long summer vacation can be a great time to learn or to do something new. The long summer vacation is always from the beginning of June to the end of August. That means young children can spend more time relaxing. Some like to do some reading or drawing at home. Some spend time outdoor activities, hanging out(闲逛) with friends, playing sports or just enjoying nature.

It is also a great time for families to travel to see interesting places for a few days or weeks. Families sometimes go to big cities to see famous buildings or places, but usually they like to find quiet places such as beaches or mountain areas.

It is also fun to go to a camp. During the summer vacation, there are many camps for school children, such as horse- riding camps, computer camps, science camps and music camps. Most children enjoy joining different camps every summer. They can make new friends and have a lot of fun.

There are also some kids spending their time in doing voluntary work— work for free. Kids will clean or paint schools, sing for the old people or read to children. Parents would like their children to do voluntary work because most of them think it is a good way for children to show their kindness.

写作要点：（1）你未来想成为什么样的人； （2）原因是什么；（3）怎么做成为更好的自己。（4）……

写作要求：（1）文中不得出现任何真实信息（姓名、校名和地名等）； （2）语句通顺，意思连贯，书写工整； （3）词数不少于80词。（文章开头已给出，但不计入总词数）

How to Become a Better Me?

Everyone wants to be better than before.