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Dear Mr. Allen£¬
I'm Li Hua, your student assistant.

¡¾´ð°¸¡¿Dear Mr. Allen£¬
I'm Li Hua, your student assistant. How about your vacation in America? I'm writing to inform you of the changes in our school.
With the increasing number of students, we have rebuilt the old teaching building and laboratory building, which have become cleaner and wider than before. Classrooms are arranged on the second floor and the third floor, and the teacher's office has been moved to the end of the first floor. What used to be the garage has been changed into our new school canteen, which is twice as big as the old one. In addition, the big news for you is that coffee and steak are served during the lunch time. I'm sure you will enjoy them.
I'm looking forward to your early return, Mr. Allen.
Yours£¬
Li Hua
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¡¾ÌâÄ¿¡¿A lot of people are interested in sea animals, especially the ones that are beautiful and smart. Although some are wild, and can be deadly, each is also unique in its own way. Whales, sharks and dolphins are the main subjects of sea-animal research, with dolphins standing out from whales and sharks for their friendly behavior with humans. No doubt the desire to learn some interesting things about dolphins has led you to this article, and you too are eager to know more about these sea creatures.

It is sometimes believed that Dolphins have been evolved from land mammals. Among sea mammals, dolphins are the most advanced in intelligence. You may be surprised to learn that they are close relatives of camels and cows. The debate on the origin of the dolphin is an unending one, however. Some believe that they evolved from land-based hoofed (ÓÐÌãµÄ) mammals, others believe thattheyevolved from other different kinds of mammals many millions of years ago. There are about 32 types of dolphins that live in salt water, each unique in its color and body shape. Five other types live in fresh water.

A grown-up dolphin eats nearly 20 to 22 kilos of fish every day. The eating habits of dolphins depend on where they live, and on the season. Seasons in which fish are abundant are like party time for dolphins. Dolphins decide how much they are going to eat based on the fat content of the fish available. They¡¯ve a good sense of understanding about their hunger.

The social skills and intelligence of dolphins make them very attractive for zoos and aquariums, where they are often trained to show off their diving skills. Dolphins also communicate with each other by special sounds.

¡¾1¡¿Scientists like to research dolphins mainly because _______.

A. they are friendly to humans B. they have good diving skills

C. they have unique bodies D. they are beautiful and clever

¡¾2¡¿The underlined word "they" in the second paragraph refers to _________?

A. Camels and cows. B. Dolphins.

C. The relatives of dolphins. D. Hoofed mammals.

¡¾3¡¿We can know for sure from the second paragraph that dolphins ___.

A. evolved from land animals B. are the most advanced animals in the world

C. have a close connection with camels D. live only in salt water

¡¾4¡¿Paragraph 3 mainly talks about ___________?

A. How dolphins know they are hungry. B. How much dolphins eat daily.

C. What dolphins like to eat. D. The eating habits of dolphins.

¡¾ÌâÄ¿¡¿One morning, Ann¡¯s neighbor Tracy found a lost dog wandering around the local elementary school. She asked Ann if she could keep an eye on the dog. Ann said that she could watch it only for the day.

Tracy took photos of the dog and printed off 400 FOUND fliers (´«µ¥), and put them in mailboxes. Meanwhile, Ann went to the dollar store and bought some pet supplies, warning her two sons not to fall in love with the dog. At the time, Ann¡¯s son Thomas was 10 years old, and Jack, who was recovering from a heart operation, was 21 years old.

Four days later Ann was still looking after the dog, whom they had started to call Riley. When she arrived home from work, the dog threw itself against the screen door and barked madly at her. As soon as she opened the door, Riley dashed into the boys¡¯ room where Ann found Jack suffering from a heart attack. Riley ran over to Jack, but as soon as Ann bent over to help him the dog went silent.

¡°If it hadn¡¯t come to get me, the doctor said Jack would have died,¡± Ann reported to a local newspaper. At this point, no one had called to claim the dog, so Ann decided to keep it.

The next morning Tracy got a call. A man named Peter recognized his lost dog and called the number on the flier. Tracy started crying, and told him, ¡°That dog saved my friend¡¯s son.¡± Peter drove to Ann¡¯s house to pick up his dog, and saw Thomas and Jack crying in the window. After a few moments Peter said, ¡°Maybe Odie was supposed to find you, maybe you should keep it.¡±

¡¾1¡¿What did Tracy do after finding the dog?

A. She looked for its owner B. She gave it to Ann as a gift.

C. She sold it to the dollar store. D. She bought some food for it.

¡¾2¡¿How did the dog help save Jack?

A. By breaking the door for Ann. B. By leading Ann to Jack¡¯s room.

C. By dragging Jack out of the room. D. By attending Jack when Ann was out.

¡¾3¡¿What was Ann¡¯s attitude to the dog according to Paragraph 4?

A. Sympathetic B. Doubtful

C. Tolerant D. Grateful

¡¾4¡¿For what purpose did Peter call Tracy?

A. To help her friend¡¯s son. B. To interview Tracy

C. To take back his dog. D. To return the flier to her.

¡¾5¡¿What can we infer about the dog from the last paragraph?

A. It would be given to Odie. B. It would be kept by Ann5 family.

C. It would be returned to Peter. D. It would be taken away by Tracy.

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