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Dear Sir,

I¡¯m writing to request a valuable chance to be one of the host families of the British students.

I¡¯m good at English and my parents are all professors of English, so we won¡¯t have any difficulty communicate with English speakers. My father is a excellent driver and we will be very glad to show foreign students around some nearby place of interest. Last month we received from two American students. We have a wonderful time. Besides, my mother is gift in cooking, but the students will be able to enjoy delicious Chinese food. I would great appreciate it if I could have the chance make friends with them.

Looking forward to your reply.

Li Hua

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How to Improve Eyesight Naturally

Eyes are important for everybody£®You must take care and try everything in your hand to keep them in good condition£®Here are some of the tips to improve your eyesight naturally£®

¡¾1¡¿

Strain is known to be a factor in many health conditions and eyestrain is no exception£®Try meditation£¬yoga or other methods of stress relief to improve your vision and overall health£®

Try palming£®

Sit upright in a comfortable chair£®¡¾2¡¿ Cup your hands so that there is no pressure on your eyes£®Let your fingers rest across your forehead£®There should be no light entering your eyes£®Palming should be done for a period of 5 to 10 minutes to start£®Palming should be relaxing£®It may help to do palming in a darkened room£®

Avoid sugar as much as possible£®

¡¾3¡¿ It will unpleasantly affect your eyesight£¬which affects the eyes by producing a larger amount of insulin (ÒȵºËØ) in the blood£®Therefore you shouldn¡¯t be having much fruit juice or something that contains a lot of sugar£®

Exercise your eyes£®

The only exercise most eyes get is that daily rubbing we give them when we're tired or suffering from eyestrain£®But eye exercises are actually good for your eyes and can improve your vision£®¡¾4¡¿Blink as fast as you can for a few seconds then close your eyes tightly£¬open and repeat£®Do this exercise 3 to 4 times daily£®

Eat healthy£®

You probably hear that statement all the time but eating the right foods are necessary to good health£®¡¾5¡¿Foods that are high in fiber£¬vitamin C£¬D and beta carotene as well as other vitamins and minerals can help improve your vision£®Here are a few foods that can be beneficial to good vision: carrots£¬eggs£¬blueberries£¬spinach£¬kale£¬grapes£¬and fresh garlic£®

A£®Reduce eyestrain£®

B£®Keep your eyes moist£®

C£®Sugar is your eye¡¯s worst enemy£®

D£®Give your eyes a workout with the following exercise£®

E£®You may not be aware that your diet affects your vision but it does£®

F£®Close eyes and cover them with the palms of your hands£®

G£®Be sure to get plenty of sleep so your eyes don¡¯t strain to stay open during the day£®

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Crows Have Had a Bad Press

¡¾1¡¿ They are smarter than any cat and sometimes children too. But despite this, they have a bad reputation.

¡°There are a few reasons for this,¡± says Kevin J. McGowan, a U.S. bird expert, who has studied crows for 25 years. ¡°One is that they¡¯re black, and in western European culture, that¡¯s bad. ¡¾2¡¿ So somebody died, lying on the side of the road, and the crows came in and picked at it because there it was, free food. ¡±

Crows are also attacked by gardeners. It¡¯s not deserved, says John Marzluff, professor of wildlife science at the University of Washington. U.S. Marzluff says crows do more good than harm to a garden. ¡°They eat a great variety of crop pest insects,¡± he said, ¡°so in the family garden they are a good natural insecticide.¡±

¡¾3¡¿

Crows have strong family values. They come closer to human beings in social behavior than any other animal studied. Crow society is family-based. ¡¾4¡¿ . When you see a number of crows gathering, they¡¯re usually family groups that are helping each other make a living.

A crow has a big ¡°vocabulary¡±. It can make around 30 calls unique to itself, each with a different meaning. From their calls, crows can tell the difference between family members, neighbors and strangers.

Young crows like to play. They get an object like a leaf or a feather and they chase eac other around, trying to get the object. Then whoever gets it gets chased.

¡¾5¡¿ They let others know when they are calm, angry, fearful and playful. Some crow emotions and behavior are amazing, such as leaving goodies-candy, keys or shiny glass-for people who feed them, or pooping on the cars of people who bother them.

A. Crow emotions are wonderful

B. Here is something more about crows that you might not know.

C. Young crows show respect for their parents as humans do.

D. They also get associated with death because in Europe there are no vultures(ͺӥ).

E. Crows are very smart.

F. Crows express emotions.

G. Parents take care of their kids, just like people.

¡¾ÌâÄ¿¡¿Zero gravity looks cool. But what about the thing no one likes to talk about? Yes, that is right: going to bathroom. Zero gravity makes this everyday task quite a challenge. Astronauts have to be toilet-trained all over again.

The Apollo astronauts raised themselves off the seat of their chairs and stuck a clear plastic bag to their back sides with sticky strips. A second astronaut watched closely to be sure no waste matter escaped the seal. (You would not want that stuff floating around the cabin!) When the deed was done, the astronaut cleaned up with a piece of plastic attached to the inside of the bag, removed the bag, dropped a disinfectant pill in with the waste matter, and put the whole thing, sealed, into a special container.

Donald W. Rethke, an engineer for Hamilton Standard Space Systems, developed a more private way to answer nature¡¯s call: the space toilet. It is somewhat like the kind of toilet one would find on commercial airplanes --- with unique adaptations for zero gravity, of course. For instance, it has thigh bars that keep the astronaut from floating off the seat.

The astronaut (male or female) defecates (Åűã) in a bag and urinates (ÅÅÄò) in a hose£¨Èí¹Ü£©. Solid and liquid wastes are kept separated because at least 85% of the urine is recycled and, yes, after careful filtration£¨¹ýÂË£©, used for drinking and other purposes. (Water is always in demand in space.) A vacuum sucks the waste materials into the toilet, where the waste is compacted into hamburger-like patties for easy storage. Although not exactly like an earthbound visit to the toilet, it is at the very least much more private than in the early days of space travel.

¡¾1¡¿According to the first paragraph, the lack of the gravity can turn something as simple as _______ into a major challenge.

A. eating B. taking baths

C. sleeping D. going to the restroom

¡¾2¡¿How did astronauts use toilet systems in the Apollo days£¿

A. None of the waste was separated as it is now.

B. Solid waste was compressed £¨Ñ¹Ëõ£©and stored on board.

C. The toilet units used water to remove the waste through the system.

D. The astronauts each used their own private restroom.

¡¾3¡¿To ensure the user remains seated, the toilet comes equipped with _______

A. a plastic bag B. a sticky strip

C. a wide hose D. a thigh bar

¡¾4¡¿What can be inferred from the fact that most of the astronauts¡¯ urine is recycled?

A.The recycled water tastes better.

B. Water is limited on the space shuttle.

C. It is very convenient to get their urine recycled.

D. Space science includes recycling urine.

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