Dolphins are our friends. They can use tools to solve problems although they don't have hands.   For example, scientists have ever found that a dolphin can make a shy eel(鳗鱼) come out of its hole with a dead fish.

Dolphins use different sounds to exchange information with each other. Scientists in Hawaii have developed a sign language to give instructions to dolphins, and the results are amazing. They find that dolphins not only understand the meaning of individual (个别的) words, but also understand the importance of word order in a sentence.

Most animals enjoy playing — but dolphins seem to like making their games as challenging as possible. On a beautiful day in 1997, scientists at a beach watched a little dog going into the sea and swimming towards the dolphins. To their surprise, the dolphins came up to the dog and then started throwing it into the air. The dog seemed to enjoy the "game" and continued playing with the dolphins for more than an hour.

Dolphins live in a very different world from ours, but they are very good at our "IQ tests” . For example, they will jump out of the water when they hear a whistle (口哨) noise. They do this because they will get a fish as a prize.

There is still much to learn about these cute problem-solvers, but it is certain that watching a dolphin show is fun.

根据短文内容，选择最佳答案。（5分）

1. What can a dolphin use to make an eel come out of its hole?

A. Its mouth.   B. Its head.      C. A dead fish.     D. A little dog.

2.How do dolphins exchange information with each other?

A. By using tails.            B. By using tools.

C. By using words.            D. By using sounds.

3.Where did the dolphins throw the dog when playing?

A. Onto its back.            B. Into the air.

C. Onto the beach.           D. Into the water.

4.Why do the dolphins jump out of the water when they hear a whistle noise?

A. Because they want to get a fish as a prize.

B. Because they enjoy playing on the water.

C. Because they want to play with other dolphins.

D. Because the dolphin keepers want them to come out.

5. Which of the following is TRUE according to the passage?

A. Dolphins understand many languages.

B. Dolphins are a kind of clever animals.

C. Scientists have known dolphins well enough.

D. Dolphins seem to make their games relaxing.

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 land animals. Their brain(大脑)is as big as men'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 receive sounds,but use the jaw--the lower part of the mouth.

It is strange that dolphins are friendly to men, and for thousands of years, there are many stories about dolphins and men. In the 19th 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 it the way. In 1903 a passenger on a boat with the name of The Penguin shot and hurt Jack. Luckily the dolphin didn't die, and after a long time he was well again. He guided the ships through the area for nine more years, but he refused to help the boat of the Penguin.

Today, some people still kill dolphins, but many countries in the world now protect them. In these places, people are not allowed to kill them.

1.The word "jaw" means_________in Chinese.

2.How do dolphins find their way?

3.Who was Jack?

4.The dolphin guided the ships for about________.

5.According to the passage, which of the following is NOT right?

A: Where did you go on your school trip last weekend?
B: We went to the ____1___________ and saw many sea animals there.
A: That must be ______2_______! What did you do there?
B: We ____3________ a dolphin show and ____4_______ with the dolphins.
A: Did you buy any _____5_________?
B: Yes. I bought many stickers of sea animals for my younger sister. She loves stickers.
A: Do you think the animals live happily there?
B: I think so. All the animals there are ______6_____ good care of by the stuff.

A science book gives facts. Some science books tell us about animals. Some tell us about plants. Some tell us about outer space. This page tells us about animals.

Do you know that not only the fish but also some animals live in the sea? For example, the whale is not a fish. It can’t breathe in the water. It swims in the water. But it comes up for air.

The blue whale is the world’s biggest animal. There are other sea animals, too. One is called the dolphin. Dolphins need air to live. They breathe air, as whales do. Dolphins are very clever. They sometimes seem to speak to each other.

Many other animals live near the sea. Seals（海豹）and otters（水獭）love the sea. They swim and play there. They eat fish and sea plants. Seals and otters have thick fur. The fur keeps them warm.

1.The passage mainly tells us about ____________.

A．fishes            B．plants            C．science           D．sea animals

2.The blue whales live in the sea. They breathe air as ______do.

A．dolphins          B．fish              C．crocodiles         D．sea plants

3.Which of the sentences below is NOT true?

A．The whale can swim in the sea like a fish.

B．The whale can breathe in the sea like a fish.

C．Both whales and dolphins are sea animals.

D．Seals and otters like living near the sea.

4.What food do seals and otters like eating?

A．Meat.            B．Fruits.            C．Both fish and sea plants.   D．Leaves.

5.Some sea animals can keep themselves warm because ___________.

A．they are big animals                     B．they like playing in the sea

C．they have thick fur                      D．they eat enough food every day

Can dolphins talk? Maybe they can’t talk with words, but they talk with sounds. They show their feelings with sounds.
Dolphins travel in a group. We call a group of fish a “school”. They don’t study, but they travel together.
Dolphins are mammals（哺乳动物）, not fish, but they swim together in a school. Dolphins talk to the other dolphins in the school. They give information. They tell when they are happy or sad or afraid. They say“welcome”when a dolphin comes back to the school. They talk when they play.
They make a few sounds above water. They make many more sounds under water. People can’t hear these sounds because they are very, very high. Scientists make tapes of the sounds and study them.
Sometimes people catch a dolphin for a large aquarium.(An aquarium is a zoo for fish.) People can watch the dolphins in a show. Dolphins don’t like to be away from their school in an aquarium. They are sad and lonely.
There are many stories about dolphins. They help people. Sometimes they save somebody’s life. Dolphin meat is good, but people don’t like to kill them. They say that dolphins bring good luck. Many people believe this.
【小题1】A school of dolphins means_____.