What's a spacewalk? Any time an astronaut gets out of a spacecraft(航天器) while in space, it is called a spacewalk. Astronautsgo on spacewalks for many reasons. For example, experiments can be placed on theoutside of a spacecraft. This lets scientists learn how being in space affects(影响) different things. By going on spacewalks, astronauts can also fix thingsinstead of bringing them back to the earth to fix.

   When astronautsgo on spacewalks, they wear spacesuits to keep themselves safe. Inside spacesuits,astronauts have the oxygen(氧气) they needto breathe and the water they need to drink. To keep the astronauts and the spacecraftsafe, the astronauts must leave and go back to the spacecraft through a specialdoor. When on a spacewalk, astronauts use safety tethers to stay close to theirspacecraft. Tethers are like ropes, connect the spacewalkers with the spacecraft.They keep astronauts from floating(漂 浮) away into space.Another way astronauts stay safe during spacewalks is by wearing a SAFER. SAFERis worn like a backpack. It helps an astronaut move around in space.

   How doastronauts train for spacewalks? One way is by going for a swim. Floating in spaceis a lot like floating in water. Astronauts practice spacewalks underwater in ahuge special swimming pool. For every one hour they will spend on a spacewalk, astronautsneed to train seven hours in the pool. Another way astronauts practice for a spacewalkis by using virtual reality(虚拟现实). It looksand feels just like a spacewalk.

   Today,only three countries have finished spacewalks independently. They are Russia, theUnited States and China. The first person to go on a spacewalk in the world wasAlexei Leonov from Russia. Zhai Zhigang is the first Chinese astronaut to go ona spacewalk. The world record of spacewalks is held by Russian astronaut AnatolySolovyev. He has been on 16 spacewalks and spent more than 82 hours outside in space.

When you are busy with your schoolwork, you might find it hard to get enough sleep. Not getting enough sleep is bad for our health. What's more, less sleep could even cause you to have fewer friends.

According to scientists from the University of California, if people don't get enough sleep, they show no interest in others.

The scientists did a small study. Some young people watched videos of people walking towards them. When the person on the video got too "close" to them, they stopped the video. It showed how close they allowed the person to get.

The result showed that people kept the person at 60% further back when they didn't have enough sleep. They felt that their personal space was invaded (入侵). But when they got a good night's sleep, they allowed the person to get much closer to them.

According to the scientists, the less sleep you get, the less you get close to others. In turn, other people may think you aredissociable and stay away from you. This can make you feel lonely and cause you to sleep even less. The situation gets worse.

So if you want to be a more popular person, sleeping well might help. "One night of good sleep makes you feel more outgoing and confident,"one of the scientists said.

Most families love to go on holiday together. It is great fun to leave your common life behind and go somewhere different and exciting!

{#blank#}1{#/blank#} Some people enjoy traveling around cities and visiting museums. Other people prefer outdoor holidays, where you can hike or go boating. Some people like cruises, where the huge ship is like a hotel.

Many families go on holiday in summer, when schools are closed.{#blank#}2{#/blank#}In the past, most British families would take their holidays at a British seaside town. However, now many people choose to go abroad instead. One reason for this is to escape（躲藏）the possibility of rain at home! France, Spain and Greece are popular destinations（目的地）.

In the United States, summer holidays often involve a road trip.{#blank#}3{#/blank#}It is common to drive hundreds of miles to get to your destination. If the beach is too far away, you could go to one of the national parks. Many people love to enjoy the natural beauty of places such as Yellowstone or the Grand Canyon.

{#blank#}4{#/blank#} In winter, many people go skiing. The Alps are a very popular place to ski. The mountain scenery is truly wonderful! You can try downhill skiing, cross-country skiing or snowshoeing.

No matter what kind of holiday you take, there are two things that nearly everyone does. The first is to send postcards to friends and family at home, so they can see a photo of the place where you are. The second is to buy some sort of souvenir（纪念品）so that you can remember your trip—maybe a T-shirt or an art piece. {#blank#}5{#/blank#}

A．Beach holidays are very popular in Britain.

B．Few people like to take holidays in winter.

C．There are many different kinds of holidays.

D．Summer is not the only season for going on holiday.

E．This means packing the whole family into the car and setting out!

F．Then once you're home, it's time to start planning your next holiday!

G．However, some families never have chances to take holidays together.

 Animals are our friends. Now a lot of people like to keep small animals as pets in their houses, such as cats, dogs. 

 People like to keep dogs best, next is the cats, and the last is the birds. Because these pets are very cute and friendly. Old people have these animals as their family members. They are like people's children. People give these pets nice names and buy nice food for them. They let them wear beautiful clothes too. People keep these pcts clean every day. They love them very much. 

 Children also like to keep these pets. They are like their friends, brothers and sisters. Children can play, sleep and take a walk with these pets. Sometimes when children are unhappy, pets are their best friends. They love them very much. 

 Pets are all very happy. They have houses and beds. They have much nice food to eat. They can walk with people in the park or go out to relax. 

 Do you think pets are important in our life? Would you like to keep a pet in your family?

March is a great time to enjoy the unusual flowers of the butterbur(蜂斗菜). This plant {#blank#}1{#/blank#} in Europe, {#blank#}2{#/blank#}, and North America. It typically grows in wet areas near rivers. The flowers appear first, usually white or pink. Then the heart-shaped {#blank#}3{#/blank#} appear and they're huge, reaching {#blank#}4{#/blank#}one meter across. In the past, the butterbur had many uses. The cool leaves {#blank#}5{#/blank#} treat headaches.