There are some easy things you can do to protect the environment and the earth. Choose ideas from the list or come up with a few of your own.

    •Plant flowers, grass or trees.

    •Whenever you visit a park or beach, take away what you bring there—keep rubbish in a bag until you can put it in a dustbin.

    •Turn off the lights and TV sets when you leave the room. This can save a lot of electricity.

    •Turn off the tap when you brush your teeth. You can save some water by not letting it run. Also, use a glass cup instead of a paper cup because this saves paper.

    •Keep the doors and windows closed in winter to keep warm air in.

    •Give your old books and magazines to a library instead of throwing them away.

    •Give your old clothes to poor children you know instead of throwing them away.

    •Use both sides of paper.

    •Stop pouring dirty water into the rivers or lakes nearby.

    •Encourage all your friends to do the same things you do to help protect the earth. You don't have to wait until Earth Day to do these things. Make every day Earth Day. If everyone makes a contribution to protecting the environment, the world will become much more beautiful.

    Have you noticed the waste bins(垃圾桶) in different colors on the street? Do you often put all the waste in the same bin? It's reported by Changchun Daily that people must do waste sorting(分类)in most places in Changchun at the end of 2019. Waste sorting is a wonderful way to make good use of energy and protect the environment. But do you know how to sort the waste?

    Usually, people should sort their waste into four groups: wet, recyclable, harmful and dry. Different kinds of waste should go into different bins. Wet waste means the things you don't want but pigs can eat, mostly coming from your kitchen. Things that can be used again, such as paper, metal and glass, are recyclable waste. Harmful waste might be dangerous or cause serious pollution, like medicine and batteries(电池). And any waste that's not wet, recyclable or harmful will go into the dry waste bin.

    Different countries are trying different methods to sort the waste. A university in England has invented a smart bin. When people drop their waste into the bin. It can tell what kind of waste it it and sort it correctly. The bin can also compress the waste to make it smaller in size and take up less space. In South Korea, people have to separate their food waste from other kinds of waste and pay for it. The more food waste they throw away, the more they pay. Japan has the strictest rules for waste sorting in the world. For example, plastic bottles and their caps should go into different bins.

What is the most convenient (方便的) way to travel around China? By train, of course. There are some ways to buy train tickets. You can buy tickets at a train station or a train office, and you can also book online with a travel app, or at China Railway's official website. You can even book by your telephone. 

Though most ticket windows at the train station serve 24 hours every day, the trouble is that you may stand in long lines. So make sure you arrive at the station at least one hour before the train leaves. And what is the easiest way to buy a ticket? Using your phone! It's simple to add the common user information in 12306 and fill in the full name following your passport. After finishing this step, 12306 will show that you have successfully registered (注册) and then you can book your tickets.

There is a small thing we use every day. We usually put {#blank#}1{#/blank#}in the bathroom. Without it, we might have tooth problems. Can you guess {#blank#}2{#/blank#} it is? Yes, it's the toothbrush. But do you know anything about its history?

According to some research, before toothbrushes appeared, the ancient Chinese people {#blank#}3{#/blank#}their teeth with some small tree branches (树枝). About 800 years ago, people made a kind of brushes with pig hair and bamboo. It might {#blank#}4{#/blank#} the world's earliest form of toothbrushes. As time went{#blank#}5{#/blank#}, the forms of toothbrushes changed. For example, people chose horse-tail hair instead of pig hair {#blank#}6{#/blank#} pig hair was too hard. Imagine that you travel back to {#blank#}7{#/blank#}of years ago and brush your teeth comfortably. It sounds fantastic, doesn't it?

Around the 15th century, the Chinese toothbrush found its way into Europe. It became {#blank#}8{#/blank#} among local people soon. The {#blank#}9{#/blank#} of toothbrushes was not as famous as that of paper-making, but it was very useful in daily life. Today we have a good {#blank#}10{#/blank#} of brushing teeth. We should thank the ancient Chinese for it.