Everyone knows water is important to all living things. But do you know these interesting 1 about water?

    Without water, the Earth would look 2 the moon. People can live several days without food, but only3days without water. Scientists say 70% of the human body is made up of water. Water 4 up 83% of our blood, 70% of our brain, and 90% of our lungs (肺). About 95% of a tomato is water, and about 80% of an apple is water. So 5 can we do to help with water problems?

   Keep a shower to 10 minutes or 6 time. It helps save much water. Use a broom to sweep the floor, the stair, the garage (车库), or the sidewalk instead of water.

     7 throw your used water away. Instead, you can use some to water plants or run the toilets. Use a bucket (桶) of water to 8 your bike or the  family car instead of water pipes.

     Use water only 9 you need it. Don't leave water running. Be sure to turn the tap 10 when you are not using it.

    National Eye Care Day on June 6th is a good chance for us to improve our eye health. What are common eye problems we have today? How can we protect our eyes? Read on to find out the answer.

    Eyes are important in our everyday life. We use them to read books, see colors and view the wonders of the world. But sometimes, we use them too much and it hurts them.

    In the past , nearsightedness（近视）was a common eye problem among children . This is mostly because of their bad eye habits, such as watching TV too long and reading books in bed .

    However , today's technology is changing the way we live . Children spend more time working and playing in front of computers , smart phones and iPads . US children spend more than 42 hours a week in front of electronic screens（电子屏幕）, US'ABC news reported .

    This has caused a new problem for our eyes : digital（数字的）eyestrain（眼疲劳）. People with digital eyestrain may get headaches , dry and red eyes , eye pain , watering and other eye problems .But don't worry . The following tips can help you protect your eyes . Try them out .

Screen advice :

⒈ When you are watching electronic screens , keep them at least 30 cm from your eyes . Try not to use your smart phone in direct sunlight .

⒉ Blink（眨眼）more often when you are looking at the screen . This can help to stop dry eyes .

⒊ Remember to take a 20-20-20 break : every 20 minutes , take a 20second break and look at something 20 feet ( about 6 meters ) away .

⒋ Spend less time in front of screens . One to two hours a day is OK for your eyes .

    The undersea world is very beautiful. Now more and more people want to 1 in the water to find the secret there. Scuba diving (水肺潜水) is a new sport today. It can take you into a wonderful undersea world.

    If you are lucky, you will 2 find many strange animals in the sea. Some are as 3 as a school bus. Some are so tiny that you may not  4 them at all.

    During the day, there is enough 5. Everything is blue and green. When fish swim nearby, you can catch them with your hands. When you have bottles of air on your back, you can stay in 6 water for a long time. However, you can't dive too deep. And you must be very 7 when you are in deep water, because something dangerous may happen unexpectedly.

    The deep sea is not an easy place to live in. It's cold, and it's 8 too. The deeper it is, the less sunlight there is. At about 3,000 feet, there is no light at all.

    Besides the cold and darkness, deep-sea animals face a third 9 —other animals. Animals eat! Many animals eat plants. However, some animals eat 10. This means these sea animals have two big jobs. They need to find animals as food, and they have to try not to become other animals' meal.

     Nowadays, many people drive their cars to work. There are a lot of cars in the street and the 1is very busy. So sometimes 2is not easy for people to get to work on time. When you are going to be late, you only dream of taking a plane there. Can your dream3?

Yes! You can take a plane only in months!

     Four engineers in Germany are4in making planes. They are making a newplane—Lilium jet. It doesn't look like a plane 5an egg. Many people think it looks funny and interesting. The great "egg" can take two people to the sky and 6three hundred kilometres in one hour. That's really great.

     Some people call Lilium jet "a flying car". Why?  Firstly, it's not difficult for people to learn to drive it. People can drive it just like driving a car. But it can go 7and farther than a car. Secondly, Lilium jet is not very big, only a quarter of a plane. So it doesn't need an airport. Only a small place is OK. It can stop8. In the future, the "flying car" will come into people's life and 9our ways of trip.

     Lilium jet will come on the market soon. 10you want to make your trip easy and funny, why not buy one?  I'm sure you will have a good time on it.

    Some people say they have an answer to the problems of cars crowding and pollution. In many cities, hundreds of people ride bikes to work every day. In New York city, some bike riders have even1a group：Bike for a Better City. They say it more people rode bikes to work, there would be fewer cars and less dirty air.

    For several years this group had tried to get help for bike riders. They want to have special roads for bikes only, because when bike riders must use the same roads2cars, there may be an accident. Some people from Bike for a Better City feel if there were bike roads, more people would use bikes.

    But3bike roads have been ready yet.

    Not everyone thinks it is a good idea. Drivers don't like it, and some shop owners don't either. And most people live quite far from the city and have to travel by car. Still 4has been done about it. On Saturdays and Sundays, the largest open park in New York is5to cars and the roads may be used by bikes only, but the group still says this is not enough and goes on fighting6bike roads.