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.

    A major development to self-driving cars may change the way we will drive in the future. Google, the leading company in self-driving technology, has changed its develop plan. It had driverless cars built by car factories, but now it will start building its own cars.

    Google has started to build some kinds of experimental electric self- driving cars that look like a Smart car or Fiat 500. There is no steering wheel(方向盘), gas pedal or brake. The only things a human passenger controls are a red "e-stop" button (按钮) for fear stops and a start button. The car's only "friendly" face is designed to make it help people accept self-driving technology.

Google workers took part in a long experiment, in which they used self-driving cars for their usual travel to work. No accident happened, but Google's heads realized that depending on a human passenger to drive in an emergency(紧急情况) wouldn't work because they may be reading, working , or sleeping. Now the self-driving car drives by itself if the driver takes his hands off the wheel for over ten seconds.

Google recently announced that its cars had covered 700,000 miles of public roads, and they were now running in busy city streets. People who love self-driving cars say this will improve transport by making roads safer, cutting down accident, and making less pollution.

    Of course, there's no need to look for parking at a crowded shopping mall. Instead, users could let their self-driving cars drop them off to park itself. A mother who took a test ride said that having the car would allow her more time to catch up with her son. The cars could also allow people who might not be able to drive to enjoy the hand-free driving. And drunk driving? Not a problem. It is very likely that by 2020, driverless cars will be common. Do you believe so?

    We are lucky to live in a rich country where we have many things. However, some of us sometimes 1 some things.

    Electricity is one thing that we waste most. Lights, TVs, radios and other things are often kept on. We should turn them off when no one is using them. It 2 less than a second to do it. Anyhow, not wasting electricity 3 money, because we do not have to pay for the electricity we do not use.

    The second thing that we often waste is water. 4 water is precious (珍贵的) and important, so it shouldn't be wasted. It is only a(n) 5 matter of turning off a tap. I am sure everybody can do it 6 if he wants to.

    Another big waste is 7. My mother used to cook so much food that much of it was thrown away. I told her we had wasted so much food. She thought l was 8. And now she cooks only what we can 9 up.

    It is not right to be wasteful. I find there is a simple way of not wasting things. That is to use only what we need and not to 10 what we do not need. In this way, we can stop being wasteful.

    The weather is not the same in many places. In some places it is always 1^, but in other places it is always wet. If the weather is too dry, the land (土地) is not2 for animals or plants. In wet weather there is too much3 and the water in rivers could 4crops (庄稼) away. So people won't have lots of5 to eat. In some other places the weather is very 6. There is always lots of snow. When it snows, all things look 7 

    In winter, days are short and 8 are long. On cold winter nights, when there are no clouds 9 winds, the moon and the stars are very beautiful. People go out to see them. When they 10to their houses, they are always happy to have hot coffee and nice cakes by the fire (炉火).

    As we know, there are four seasons in a year. When spring 1, it's getting warmer and warmer. Everything comes back to life. Trees turn 2. There are beautiful flowers and grass here and there. Children can 3 kites in the sky. 4 summer, the weather becomes hot. 5 people can take part in more activities outside, such as running in the morning, taking a walk in the evening, going camping, 6 in the river, travelling with family, and so on. 7 comes after summer. It's a harvest season. We can taste 8 of fresh fruits. The weather is neither too hot nor too cold. People feel comfortable. It usually snows in winter in my home town. Snowing 9 me excited. Children are 10 in making snowmen outside. A heavy snow will predict a good year. The four seasons bring us happiness and pleasure. We should love and treasure (珍惜) them.