We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons: most of them move to find food more easily, but others move to get away from places that are too crowded.
When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration (迁徙) is probably the migration of fish, which is called “salmon”(蛙鱼). This fish is born in fresh(淡的) water but it travels many miles to salt water. There it spends its life. When it is old, it returns to its birthplace in fresh water. Then it gives birth and dies. In northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and many of them are killed when they fall into the sea.
Recently, scientists have studied the migration of a kind of lobster (龙虾). Every year, when the season of the bad weather arrives, the lobsters get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody knows where they go. So, sometimes we know why humans and animals move from one place to another, but at other times we don’t. Maybe living things just like to travel.
【小题1】 Most animals move from one place to another at a certain time to _______.

A mother planted many kinds of vegetables in her garden. One day, she said to her 31________, “Betty, come here. Look at all these little yellow marks on the 32________ of the cabbages. They are eggs of a kind of insect(虫子). They are very beautiful but very bad for cabbages. This afternoon you must 33________ all the eggs on the leaves and kill them. In this way, you will help us have 34________, greener and bigger cabbages.”

   Betty didn’t think she could do it 35________ and in the end she forgot all about it. The mother fell ill for a few days and 36________ work in her garden. When she was well, she took Betty with her to the garden to see the cabbages. To 37________ surprise, the insects had eaten every leaf. When Betty saw this, she began to 38________. Then her mother said to her, “We should never put off what we have to do today till 39________. And you must learn to deal with the bad things while they are small, 40________ it will turn into a big problem.

1. A son  B. mother   C daughter 

2.A tress   B. leaves   C. grass

3. A find   B. eat   C. fly

4. A worse   B better   C thinner

5.A at most   B at last   C at once

6.A must   B couldn’t   C need

7.A my   B their   C his

8. A cry   B wait   C run

9.A yesterday   B today   C tomorrow

10.A. but       B. or      C. and

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.