A long time ago, people thought that the Sun went round the Earth. In some countries people even said that the Sun was a god (神). They thought the god drove across the sky each day on a golden horse. Now we know the Earth goes round the Sun. It takes the Earth a year to go all way round the Sun. Today men even know how far it is for the Earth to go round the Sun. They tell us that the Earth travels over a thousand miles a minute on its journey round the Sun.

    The Sun is really a star. It is much bigger than the Earth and it is very hot. Some people have been to the Moon but we know that no one can ever go to the Sun. It is far too hot for people to live anywhere near it. The Sun is about three hundred thousand times heavier than the Earth and more than a million times larger.

    Today we are learning about World Water Day. Our teacher asks us to find something about it and then write a report. So I look for the following information on the Internet.

    World Water Day is on March 22 every year. It teaches people the importance of fresh water. And it asks people to do something to save water. Nowadays, the water problem is a serious problem for the people in the world.

    Many schools give much support (支持) to World Water Day. They are trying to teach students the importance of saving and reusing water. For example, Michigan State University held a contest(竞赛)for" best World Water Day poster" in2017. Primary school children in the Philippines took part in a "My School Toilet" contest in 2010.

    As for World Water Day, there is also a theme (主题) for each year, such as "Leaving no one behind" in 2019, " Nature for Water" in 2018 and" Why Waste Water?" in 2017. The first World Water Day started in 1993. It is an international day now.

Tony lives in a big house, and his family is rich (富有的). He has a bad 1 . He always wastes (浪费) food. For example, he 2 eats half of an apple and throws away (扔掉) the other half. His mother always 3 him not to do that, but he doesn't 4 his mother. He thinks his father has a lot of money, so it's not a big deal. "My mother is too strict 5 me," he says. He doesn't like exercising, 6 . His home is not far from school, but he never walks 7 rides a bike to school. He asks his mother to take him to school in the 8 . He says to his mother. "We have a car, so 9 do I need to ride a bike or walk to school? Walking 10 me tired."

One day, in a geography class, his teacher 11 some pictures of Africa to Tony and his classmates. Many 12 have no food to eat there. They are thin because of hunger (饥饿). Their teacher asks them to 13 money and do something to help them. Tony feels 14 for what he did before. He knows what his mother did is to help 15 develop (养成) good habits.