Dolphins are not fish. They are mammals (哺乳动物) , They live in groups and speak to each other in their own language. But they are quite different from almost all the animals. Their brain(大脑) is as big as man’s and they live a long life— at least 20 or 30 years.

  Like some animals, dolphins use sounds to help them find their way around. They also use these sounds to talk to each other and to help them find food. They do not use their ears to get sounds, but use the jaw—the lower part of the mouth.

Dolphins are friendly to man, and for thousands of years, there are many stories about dolphins and man. In the 19^th century, in a dangerous part of the sea near New Zealand, there was a dolphin. The seamen liked him very much and gave him a very good name, Jack. From 1871 to 1903, Jack met every boat in the area and showed them the way. In1903 apassenger(乘客) on a boat with the name “The Penguin” shot and hurt Jack. Luckily the dolphin didn’t die, and after a long time he was well again. He helped the ships find the way through the area for nine more years, but he didn’t help the boat “The Penguin”.

Today, some people still kill dolphins, but many countries in the world now protect them. In these places, people mustn’t kill them.

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Usain Bolt said he planned to keep his Olympic 100m and 200m sprint（短跑比赛）titles（冠军）at the 2016 Rio de Janeiro Games（里约奥运会）. Bolt, who kept both titles as well as the 4x100m in London, said he decided against changing to either the 400m or long jump.

“To do the three sprints, that is the focus（焦点）. I don’t want to try any different events at Rio,” he said, “I will just keep my titles to show the world there’s a possibility I can do it again.” The 26-year-old runner insisted he would keep on his hard training.

 Bolt also holds the 100m and 200m world records. He added, “It’s all about hard work. I did great when I was young. People used to say I was fast for my age and talent, but I have put a lot of work into it since I was a senior athlete. I continue to work hard, continue to stay focused and push myself. So for me that’s the focus right now—to see how fast I can go and I try to go faster each year.” 

 Bolt became the first man to keep two Olympic sprint titles in London in 2012. He won the 200m in 19.32 seconds. And he also won the 100m in 9.63 seconds, just 0.05 seconds slower than his own world record. 

Bolt’s focus on sprints shows us that it doesn’t matter if we try something different. The most important is to keep working hard.

Going to college means a lot of changes in their lifestyle for most students. Living in a dormitory remains a major challenge as it means learning how to share space with others who are total strangers.

While some can live together peacefully, others may face conflicts (矛盾) that need to be worked out. According to a recent survey of students in 12 different universities in Wuhan, only 40 percent of them are satisfied with their dormitory friendships and 35 percent said they keep away from conflicts in the dormitory.

For those living in a dormitory for the first time, sharing things, such as a computer or paper towels, can be a source of conflict. Another common conflict is related to different habits. What they are going to do, such as going to bed, watching movies or studying, will also cause a conflict. Sometimes roommates may also have problems when welcoming guests, especially those of the opposite sex.

However, there are moreeffectivemethods to solve problems than shouting at each other. The best way is to talk about an issue(争论) before it even becomes a problem. You should treat roommates honestly and directly, and try to work out a solution. And you can also set up rules that everyone can obey. These rules can be written down in an agreement and be put up in a visible (看得见的) place. Students can also outline which items to share and which are for personal use. They can regulate cleaning duties, agree on a time to sleep, and decide on how to receive guests.

In any discussion it is important to talk with your roommates in a positive way. For example, you could mention your roommates’ good personality. This can help them understand you better and make them more willing to compromise (妥协).

 Let’s look at some of the most dangerous animals in the world .

根据材料，选择最佳答案。

A Bite of China(舌尖上的中国) has become a hot topic on the Internet in China. It is a seven-episode(集) program. It is about traditional Chinese food.

The documentary has attracted over 100,000,000 Chinese audiences(观众). Most of them don’t see this program as a common food show, because it shows them the value of Chinese food and the changes in China today. The audiences can see how hard the cooks and farmers work to make such wonderful Chinese food.

Chen Xiaoqing, the lead director of the program, says that the program is not only about eating, but also about Chinese culture. His friend Liu Wen said, “We also wanted to show international audiences what China is like today.”

“A Bite of China will be out of English version(版本), ” said Chen Xiaoqing. “We should be thankful to the people who make so much delicious food.” added a reporter Wang Lu.

Not all the news is bad about endangered(濒临灭绝的)animals. In the United States,some endangered animals are making a comeback!

Gray Wolf: By the 1970s, the gray wolf nearly vanished from Yellowstone National Park. In 1995 and 1996, people brought 66 wolves from Canada and set them free in the wild areas of the Yellowstone National Park and central Idaho.

Bald Eagle(秃头雕):Before Europeans came to North America, there are many bald eagles. As people moved west,they took away the eagles' natural living place. Egg collectors and pesticides (杀虫剂)on the farm almost made. the bald eagle population very small. However, many years ago the local government made laws(法律)to protect the eagles. Now,there are more bald eagles living in the Lower 48 States.

Grizzly Bear:In the 1800s, People could find about 50,000 grizzly bears in the West. Today, the bears are making a comeback in several Western areas, such as the Yellowstone National Park.

     The Arts Cinema is open 7 days a week, showing lots of American and foreign films. Next week it will show an Australian film called “Midnight Meeting”. It is set in Sydney in the 1960s. you can see that film from Monday to Thursday. It will be on twice a day at 6:30 and 9:10 in the evenings. The film lasts two hours and fifteen minutes. Tickets are 4 dollars, but there is a special student ticket at 2.6 dollars for all the films. Please bring your student card if you want the cheaper tickets.

The nearest car park to the cinema is in Hamlet Street. It is just five minutes’ walk from the cinema. If you need further information. Call 864-7712 during office hours –9 a.m. to 4:30 p.m., Monday to Friday.

 A team of “Chinese Dama” will be invited to perform their square dance in Canada.

   Dama is Chinese pinyin that means “older mothers” in English. It refers to a group of women, usually middle-aged or older, who get together in parks or squares to dance to pretty loud music.

   Recently 30 Chinese Dama from Guangzhou, China, have received the invitation to Ottawa, the capital of Canada. Last Wednesday, an officer from Ottawa said that more and more Chinese elements (元素) would be added to this year's Canada Day to show the friendship between the two countries.

   Ottawa is the place for the county's biggest birthday celebration on July I every year. On that day, people wear their best red and white clothes to take part in all kinds of celebration activities. And these Chinese Dama will dance to Little Apple and the Hottest Ethnic Trend (《最炫民族风》), two of the most popular folk songs in China, on Canada Day.

   “The government will hold a big welcome dinner for Chinese guests,” said the officer. “Every Chinese performer will be named the honorary citizen (荣誉市民) of Ottawa.”