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Once a circle lost a piece of its own. The circle wanted to be whole, so it went around, looking for its m1. piece. But because it was not complete , it could only roll (滚) very slowly. It enjoyed the flowers and the sunshine a2.the way. It talked with worms. It found lots of different pieces, but n3. of them fit. So it left them all by the side of the road and kept on l4. for the lost piece. Then one day the circle found a piece that fit p5.. The circle put the piece into itself , It could be whole with nothing lost. It was so h6. and began to roll. As it was a perfect circle, it could roll very f7., too fast to see flowers or talk to worms. It realized how different the world was when it rolled so quickly. It felt so sad that it stopped, left its found piece by the side of the road and rolled very slowly.

Sometimes we are perfect when we lose some thing. A man who o8. everything is poor in some ways. He will never have hopes, dreams or something better. He will never know some one loves him or someone is giving him something he has always wanted or never had.

We couldn't be perfect. But we must be brave e9. to love, strong enough to forgive, kind enough to s10. happiness with others and clever enough to know there is enough love around us and then we can always have a wonderful time in our life.

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Though water does not seem all that exciting, it is very valuable. The Ancient Greek people believed all the fresh water on the Earth came from a river called Okeanos. They imagined that clouds collected rain from its magical waters (海域). The reason they believed in this is because water is important for humans, Doctors say that without water we would die in about one week.

There are two places that our fresh water comes from. The first is surface water, which includes all the water in lakes or rivers. The second is groundwater, which refers to all the water that comes from under the ground.

Water must be treated before it can come out of the tap (水龙头). First, anything harmful in the water must be removed. Then a cleaning agent (净化剂) is added. This will destroy any remaining germs (细菌).

There have been reports of factories in China letting waste water leak into the ground. Industrial waste water is a big problem as it can pollute our drinking water. Even if the water is treated, it is unfit for drinking. The Ministry of Environmental Protection has improved the water in China since 2004. In 2011, 76 percent of water was safe for dinking. But treated water should always be boiled before drinking.

Some countries have more fresh water resources (资源) and this means that it is easier for them to treat their water.

A report from a British Consulting Firm called Maplecroft found that Iceland has the best fresh water supply in the world. That is because most of the tap water in Iceland comes from pure mountain springs. No treatment of any kind is required before Icelandic people drink their delicious water.

1.What is the main topic of the first paragraph?

A.An Ancient Greek story. B.The importance of water.

C.Okeanos the river. D.Clouds and water.

2.Where does our fresh water come from?

A.From surface, water and lakes or rivers. B.From surface water and groundwater.

C.From a river called Okeanos. D.From the groundwater and Iceland.

3.What do we know about tap water?

A.It comes directly from groundwater.

B.It comes directly from lakes or rivers.

C.The cleaning agent in it is bad for our health.

D.It must be treated before it comes out of the tap.

4.What do the underlined words "leak into" in the fourth paragraph mean in Chinese?

A.填满 B.覆盖 C.渗漏 D.倒入

5.Iceland has the best fresh water supply in the world because ________.

A.they always boil the water before drinking

B.there is no water pollution in Iceland

C.they have the best water treatment technology

D.most of the water comes from pure mountain springs.

Long ago,as people got older,there was something wrong with their teeth and it would be very painful. To avoid a toothache,they had their teeth pulled out. Later people learned that cleaning their teeth was important,but they didn’t have toothpaste (牙膏) at that time. They used lemon juice,salt or other things to clean their teeth.

It was only about 100 years ago that someone finally created a mint (薄荷) cream to clean teeth. Not long after that,the toothpaste tube (管子) was invented,so people could squeeze (挤出) the toothpaste right onto the toothbrush! Tooth brushing became popular during the World War I. The U. S. Army gave brushes and toothpaste to all the soldiers,and they learned to brush teeth twice a day. Back then,toothpaste tubes were made of metal;today they’ re made of soft plastic and are much easier to use!

Today there are plenty of toothpaste choices:lots of colors and flavors (口味) to choose from,and some kinds of toothpaste are made just for children. When you’re choosing a kind of toothpaste,make sure it has fluoride (氟化物). Fluoride makes your teeth strong and healthy. When you brush,you don’t need a lot of toothpaste:just squeeze out a bit.

1.People used to to avoid a toothache.

A.pull out their teeth B.take some medicine

C.drink more water D.eat more vegetables

2.What was NOT used to brush teeth in the past according to the passage?

A.Salt. B.Lemon juice. C.Mint cream. D.Tea.

3.What can we learn from the passage?

A.There is no special toothpaste for children.

B.We should choose toothpaste with fluoride.

C.Toothpaste can’t be made into different flavors.

D.Squeeze out as much as toothpaste when you brush teeth.

When a leafy plant is under attack, it doesn’t sit quietly. Back in 1983, two scientists, Jack Schultz and Ian Baldwin, reported that young maple trees getting bitten by insects send out a special smell that neighboring plants can get. These chemicals come from the injured parts of the plant and seem to be a warning. What the plants pump through the air is a mixture of chemicals known as volatile organic compounds(VOCs).

Scientists have found that all kinds of plants give out VOCs when being attacked. It’s a plant’s way of crying out. But is anyone listening? Obviously. Because we can watch the neighbors’ react.

Some plants pump out smelly chemicals to keep insects away. But others do double duty. They pump out perfumes to attract different insects who are their natural enemies. Once the insects arrive, the tables are turned. The attacker who was lunching now becomes lunch.

In study after study, it appears that these chemical conversations help the neighbors. The damage is usually more serious on the first plant, but the neighbors stay safer because they heard the warning and knew what to do.

Does this mean that plants talk to each other? Scientists don’t know. Maybe the first plant just made a cry of pain or was sending a message to its own branches, and so, in fact, was talking to itself. Perhaps the neighbors just happened to hear the cry by accident and so wrong information was exchanged.

Charles Darwin, over 150 years ago, imagined a world far busier, noisier and more intimate than the world we can see and hear, our senses are weak. There’s a whole lot going on.

1.What does a plant do when it is under attack?

A.It makes noises. B.It gets help from other plants.

C.It stands quietly. D.It sends out certain chemicals.

2.What does “the tables are turned” mean in Paragraph 3?

A.The attackers are attacked. B.The insects gather under the table.

C.The plants get ready to fight back. D.The perfumes attract natural enemies.

3.Scientists find from their studies that plants can__________.

A.talk to one another B.predict natural disasters

C.protect themselves against insects D.help their neighbors when necessary

4.What can we learn from the last paragraph?

A.The world is changing faster than ever. B.People have stronger senses than before.

C.The world is more colorful than it seems. D.People in Darwin’s time were full of imagination.

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