The Aborigines (澳洲土著) have lived in Australia for about 60,000 years. They painted pictures inside caves, and these are the rock paintings that have given us so much information about Aboriginal life. For example, some of the paintings that are about 10,000 years old show men with boomerangs. From this we know that the Aborigines started using boomerangs for hunting at that time. Other pictures show kangaroos, so we know that there were kangaroos at that time.

    The Aborigines believed that spirits made people, animals and plants, and that these spirits still live in the earth. For Aborigines, no one can own the earth—the earth belongs to the spirits.
    In 1700, there were many Aboriginal groups with a population of 750,000 all over Australia, and there were probably more than 240 different Aboriginal languages. The groups did not have a leader. Instead, things were decided by the older men in a group. People from different groups often travelled hundreds of miles to meet each other.
    Aboriginal life changed when an English boat arrived in Australia in 1770. Many Aborigines were killed in the wars that they had with the English. More Europeans came, and they started taking land from the Aborigines. The Europeans also brought new illnesses that killed the Aborigines. The result is that today there are only about 300,000 Aborigines in Australia.

   Recently, many people have begun to try a new way of doing shopping through the Internet. They are very interested in it. Why is itbecoming more and more popular now? There are some reasons. First, more and more people have their own computers and their computers can be joined with the Internet. So it is possible for many of them to do shopping through the Internet. Second, shopping through the Internet can save them some money and a lot of time. Third, they don't need to go to the shop themselves.  Because of these good facts, few people refuse it.
   On the other hand, some people don't like this new way of shopping. They are worried about the safety of shopping online. Customers(顾客)can only see the pictures of a product on the Internet. And they can't enjoy the pleasure of buying things in a large supermarket or a wonderful shopping center. These are the reasons why they do not like it.
   But I think more and more people will like this new kind of shopping in the future.

   It's a fine day. TheWhite family gets up at seven o'clock. They have breakfast at seven forty. Andthen they go to the park. They take a basket of food and a carpet (地毯).The park is not far from their home, so they ride bikes there. When they get tothe park, it's half past eight. Mr. and Mrs. White are talking with each other.Their son, Ted, is playing with a ball. Their daughter, Jenny, is takingphotos.

    After about an hour, Ted and Jenny sit down to relax. At that time, they see a squirrel eating a pine nut (松子)in a big tree. When they see the squirrel eating, they feel hungry. They go tohelp their parents take the food out of the basket. Ted has a hamburger.Hamburgers are his favorite food. Jenny has an apple. Mr. and Mrs. White havesome bread. They have a great time in the park.

Michael is a 12-year-old student. He and his parents are going to travel around Hangzhou this summer. Here is some information that he got.

Do you have a dog? What can your dog do for you? Do you know that dogs can read our feelings? Now some people find that dogs can smell people's stress(压力). 

Dogs are really man's best friends. They have special smell. A new study said that dogs can smell if people are feeling stressed. Teachers at Queen's University, the UK, made the study. They got breath(呼吸) and sweat(汗) from people both before and after doing a hard maths problem. They looked at people's heart rate(心率), blood pressure(血压) and stress feeling in the study. Dogs can smell the differences in breath and sweat from people. Then they can know when people are stressed. 

The finding is wonderful: Dogs found stress in 675 of the 720 people. " They could be 93. 75% right!" Australian News reported. The study's writer Clara Wilson said, " Stress can change people's breath and sweat. Dogs are very good at smelling these changes. " In the study, she also said, " This finding helps us learn that how dogs may know people's feelings. "

This finding shows how special the bond is between people and dogs. The finding also tells us that dogs are very clever. And maybe dogs can help stressed people. 

 In a primary school of Yunnan, there' re over 500 students, but no one is nearsighted(近视). It's hard to believe. Three hours of outdoor play and no mobile phones or computers— this might be the reason why they all have good eyesight. 

 In the school, children eat healthy food and have enough sleep every day. During class breaks, all of them need to go outside. When the three sports teachers of the school are busy, other teachers will teach students to play basketball and table tennis. 

 To stop students from using mobile phones, the school had six public(公用的) phones for them to call their parents. Even on weekends and during holidays, the school tells parents to care about kids' eye health in teacher-parent WeChat groups. 

 Sun Fubiao, the primary school' s headmaster, tries his best to help students protect(保护) their eyesight, because he himself and five other teachers are nearsighted. "It' s uncomfortable to do many things wearing a pair of glasses in daily life, " he said. "I do not want the children to have the same bad experience. "

 Now, people come up with many ideas to protect children's eyesight. Children should play online games for no more than three hours a week. They need to do eye tests each term. Schools can' t give homework to first and second graders. ____▲____ . But for them, it' s more important to go outside and play.