March 22nd is World Water Day. It started in 1993. It not only makes us think about the importance of water, but also calls on (号召) us to 1 and protect water. Today, we're facing terrible water problems. Among them, wastewater problem is especially2. And the subject of World Water Day in 2017 is “wastewater”.

    What is wastewater? It is used water. Usually, wastewater comes from homes, 3, hospitals and so on. It is produced by different kinds of activities, including washing the machines, taking showers and using the kitchen. The rain also 4 wastewater when it is running down the street during a storm. No matter where it comes from, this kind of water is sure to have5harmful in it.

    6must we treat (处理) wastewater? Wastewater has a big influence on our life. It causes both illness for us and pollution for the environment. We must care for our environment and our own7.

    How can we treat wastewater? Different kinds of wastewater need different ways of treatment. Wastewater 8 homes can be reused. Then there will be 9 wastewater. Also, factory wastewater has to be cleaned 10 it goes back to nature.

    We cannot stop earthquakes, but we can do things to make sure they do not destroy (破坏) whole cities. First, it is not a 1 idea to build houses along the lines where2of the earth's plates join together. Second, if you think there 3 be an earthquake, it is better to build houses on rock, not on 4. Third, you must make the houses as 5 as possible. Weak buildings will fall down in an earthquake, but strong ones may 6.

    Scientists are 7 that one day an even bigger earthquake will hit the part around S an Francisco. They call it “The Big One”. But people today are still building more 8. The population in and around San Francisco 9 is ten times more than it was in 1906. This means that 10 there is another earthquake, a great many houses and buildings will be destroyed.

    The Artic Region (北极地区) is one of the coldest place in the world. It is cold all year round. Spring comes from May to June. The ice and 1 begin to melt (融化). The plants begin 2 and the animals look for food. The summer comes from July to August. The temperature is summer can get only -8℃. It should be 3 warmest season here. Autumn comes from 4 to October and it lasts short. 5 comes quickly from November to April next year. Winter is the 6 and coldest season of a year. And the Artic Region is filled with ice and snow everywhere. At this time there is no 7. So it looks like night in winter.

    Are there any people living in such a 8 lace? Yes, they are Eskimos (爱斯基摩人). It is 9 for them to live there, 10 they live happily with a long history.

    Mike was the kind of guy you love to hate. He was always happy and always had something interesting to say. If someone asked him how he was doing, he would reply, "Couldn't be better!" He was really a care-free young man and never felt tired.

    Mike used to say, "Each morning I wake up and say to myself, 'Mike, you have two choices (选择) today. You can choose to be happy or you can choose to be upset.' I choose to be happy. Each time something happens, I am always ready to learn a good lesson. I choose to learn from life."

    I tried to understand what he said. Indeed life is all about choices. Every situation is a choice. The bottom line is: You're living your life and you make it either happy or sad.

    Several years later I had a car accident and my legs were seriously injured. When I was lying on the ground, I remembered that I had two choices: I could choose to live or choose to die. I chose to live.

    People like to say, "Choose the one you love and love the one you choose." Why not choose the one we love and live happily?