Imagine one day, the water taps(水龙头) in your house stop running. You have to buy water from shops. And still there isn't enough water for everyone. Your mother has to save the family's shower water to do other things. Would you be able to stand that kind of life?

Probably not! But that's what kids in Yemen(也门) are experiencing. Experts say Yemen is going to be the first country in the world to run out of water. According to a report, the capital, Sana'a, will run out of drinking water as early as 2025.

Because of the shortage(短缺), the government often cuts the water supply(供应). Hannan, an 18-year-old girl from Lahej, told The Times," In a good week we'll have a water supply all week. But then the following week there will be water only for a day or two. .

Hannan said only rich people have enough water to use. They can buy water from shops or from the water trucks. Private companies own the trucks. They travel around the city every day to sell water at very high prices. "A lot of people can't afford it," she said.

The average(平均) person in Yemen uses 100 to 200 cubic (立方的) metres of water every year. That is far below the international water poverty (贫困) line of 1, 000 cubic metres.

The government is thinking of making use of seawater. But it will cost a lot and it may not happen soon enough to help the people of Yemen.

Are there too many of us on Earth? Now, many people say overpopulation is the biggest danger to Earth. There is only so much space. The amount of food, water and energy on Earth is also quite limited (有限的). So the planet can hardly support more people, can it?

The answer to this question may be "Yes." David Satterthwaite, an environmental scientist, points out that the problem is not about the number of people on the planet. Instead, it's about the amount of their consumption (消耗)."The world has enough for everyone's need, but not enough for everyone's greed (贪心), "he explains.

As it stands now, the world's population is over 7.8 billion. According to the United Nations, it could reach 9.7 billion in 2050, and over 11 billion in 2100. The population in the future is predictable and most of the growth will be in today's underdeveloped countries. The influence of adding several billion people to these countries might not be huge. Traditionally, people in these countries consume little. A much greater environmental footprint on our planet is left by people in higher-income(更高收入) countries.

However, the world is changing all the time. People in low income countries may break their tradition. If they consume as much as people in high-income countries do, the influence of the population growth in the future could be much larger. So, if we want Earth to support a larger human population, all of us should try to limit our consumption and also, our greed.

The progress of technology in farming, electricity production and many other fields may help Earth support more people. Scientists also have discovered many Earth-like planets. Perhaps some of us may be able to live away from Earth in the future. But space technologies still have a long way to go. Earth is our home town and we should take care of it.

The Nissan LEAF is an environmentally friendly car. It uses energy stored in its rechargeable batteries(充电电池)as power. This electric car can go 80 miles per hour on the freeway(高速公路).

The LEAF costs $32, 780. It seats five adults and can travel about 100 miles on a single charge. This 5- door, 5-seat, hatchback(掀背式轿车) has the right size and range(行程) for many who drive under 100 miles every day, or for families with more than one car. For others, the car isn't the best choice because of its short range.

内容提示：

1）Reuse the paper;

2）Use cloth bags instead of plastic bags;

3）Turn off the lights when we leave the classrooms.

注意：

1）必须包括全部提示要点，可适当发挥;

2）词数80- 100, 开头和结尾已给出，不计入总词数。

Now more and more people realise the importance of protecting the environment. As a result, what can we do to protect the environment?

……

If everyone makes an effort to protect our environment, it will become better and better.

World Environment Day is held each year on June 5. It is one important way through which the United Nations encourages worldwide awareness and action for the protection of our environment and gets political attention and action, World Environment Day promotes some ways to improve the earth's environment.

●What do people do? World Environment Day is celebrated in many ways in countries such as Kenya, New Zealand, Poland, Spain and the United States. Activities include concerts, tree planting, and clean- up campaigns.

●Background World Environment Day was established by the UN General Assembly in 1972. Two years later, in 1974 the first World Environment Day was held with the theme" Only One Earth". Even though World Environment Day celebrations have been held annually since 1974, in 1987 the idea for rotating the centre of these activities through selecting different host countries began.

●Symbols The main colours for this event are natural colours. These colours are often green, brown and blue. Images of the earth's natural features, such as snowy mountains, clean beaches and unpolluted rivers are used to improve campaigns on the day.

Energy is everywhere. We use energy to move the mouse for a computer, to jump and shout and walk and run.

Electricity is a form of energy and this is what powers the TV, hairdryer, mobile phone, fridge, electric toothbrush and more! Our growing need for energy is one of the problems facing the world today, because producing electricity also produces pollution.

Here are some simple ways to make a big difference when using electricity.

On or off? Turning off televisions and computers by a remote controller will leave a little red light on the screen, which still uses electricity, even though they might look like they've been turned off.

Lights off! Turning lights off when you're not in the room can save a lot of energy.

Fridge door closed. The fridge is an important part of the kitchen. It keeps food fresh, cool and healthy! But it takes a lot of energy to keep cool, so don't leave the fridge door open or put hot things inside.

Use the sun's energy. An increasing number of people are fitting solar panels to their homes. They create electricity from sunlight, which can then be used to power their homes. Solar heating panels make hot water, reducing the need for electricity or gas to heat water.

It's our duty to look after our home- the earth! To (保护) our environment, we should do something in our (日常的) life. Firstly, we should (分开) the waste into two parts-things we can (回收利用) and things to throw away. Secondly, we must try our best to use (瓷器) cups and cloth bags. While shopping, we'd better use baskets instead of (塑料的) bags. Thirdly, don't always think of buying new things. Some (用过的) things are also as good as new ones. For example, we can use both sides of paper, remember to learn to save resources. Of course, we can't hope for a (快速的) change, but let's take (措施)from now on. Repeat these things every day, and we can surely (减少) waste. Day by day, the environment will be better and greener. We can live more healthily, and our home can be saved. Do you think so?

Suraj was playing games with his friends after the science class. As soon as his maths teacher came to the classroom, he (move) back to his place.

And it happened (sudden). Suraj wet his trousers! He felt very ashamed (羞愧的). He imagined what his friends would think about him. They would talk about it for (year) and he would become a joke for everyone in the class.

In the front the classroom, the math teacher was looking for someone (answer) the questions. She watched Suraj for a while and called his name.

Suraj got very nervous and he didn't know to do. He was afraid that everybody would see his wet trousers he stood up. At this time, Kiran, who sat next to Suraj, handed (he) a bottle of water and asked him to calm down. When he reached out for the water, Kiran accidentally dropped it. Then all water fell on Suraj.

The classmates and teacher were (surprise) and hurried to help. After school, Suraj thanked Kiran with all his heart. Kiran smiled and said,

"Hey I know buddy! I experienced same a few months ago. I wet my trousers!"

Waste can be seen everywhere in the school. Some students ask for1food than they can eat and others often forget 2 off the lights when they leave the classroom. They say they can 3 these things. But I don't agree 4 them.

Waste can bring a lot of 5, 6 China is rich in some resources, we are short of others, for example, fresh water. It is_7 that we will have no coal 8 oiltousein100years.Soifwegoon 9 our resources, 10 can we use in the future and 11 can we move? Think about it. I think we should say no to the 12 who waste things every day. Everybody should stop wasting as soon as possible.

In our 13 life, we can do many things to reduce waste. For example, turn off the water taps when we finish washing, turn off the lights when we leave the classroom, try not to order more food than we need, and so On. Little by little, bad habits will 14 Waste can be stopped one day, if we do15 best.