Life in the twenty-first century will be very different from life today. Between then and now many changes will take place, but what will the changes be?

The population is growing fast. There will be many people in the world and most of them will live longer than people live now.

Computers will be much smaller and more useful, and there will be at least one in every home. And computer studies will be one of the important subjects in schools then.

People will work fewer hours than they do now and they will have more free time for sports, watching TV and travelling. Travelling will be much easier and cheaper. And many more people will go to other countries for holidays.

There will be changes in our food, too. Maybe no one will eat meat every day, instead they eat more fruit and vegetables. Maybe people will be healthier.

Work in the future will be different, too. Dangerous and hard work can be done by robots. Because of this, many people will not have enough work to do. This will be a problem.

1.There will be _________ in the future.

2.In the future the computer will be _________.

3.In the future more people _________.

4.People will prefer _________ to _________ in the future.

5.The robots will _________ in the future.

Do you know why different animals or pests(昆虫)have their special colors? Colors in them seem to be used mainly to protect themselves.

    Some birds like eating locusts(蝗虫), but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of colors of crops(庄稼). When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.

    If you study the animal life, you’ll find the main use of coloring is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters(猎人). This is because they have the colors much like the trees.

    Have you ever noticed an even stranger act? A kind of fish in the sea can send out a kind of very black liquid(液体)when it faces danger. While the liquid spreads over(散开), its enemies(敌人)cannot find it. And it immediately swims away. So it has lived up to now though it is not strong at all.

1.From the passage we learn that locusts _______.

   A. are small animals                      B. are easily found by birds

   C. are dangerous to their enemies            D. change their colors to protect themselves

2.How can pests with different colors from plants keep out of danger?

   A. They run away quickly.

   B. They have the colors much like their enemies.

   C. They hide themselves by day and appear at night.

   D. They have to move quietly.

3.Bears and lions can keep safe because _______.

   A. they have the colors much like the trees   B. they move quietly

   C. they like brown and gray colors            D. they live in forests

4.Why can the kind of fish live up to now?

A. Because it is very strong.  

B. Because the liquid it sends out can help it escape from its enemies

C. Because the liquid it sends out can kill its enemies.

D. Because it swims faster than any other fish.

5.Which is the best title for this passage?

   A. The Change of Colors for Animals and Pests   B. Colors of Different Animals and Pests

   C. The Main Use of Colors for Animals and Pests  D. Some Animals and Pests

Mr. Black has two cats(猫). One is big(大的) and the other is small（小的）. He likes them very much. One day his friend Mr. Green comes to see him. He is surprised(惊奇). He find there are two holes(洞) in the door, a big and a small one. He says, “My dear friend, why are there two holes in your door?” “To let them in or out,” Mr. Black answers. “But why are there two holes?” asks his friend. “ How can the big cat go through（通过）the small hole?” he says.

1.Mr. Black has ____________.

A. two small cats

B. two big cats

C. a big and a small cats

2.Mr. Green comes to see___________.

A. Mr. Black               B. the cats            C. the holes

3.Mr. Black wants _____________ to go through the two holes.

A. the big cat               B. the small cat       C. the two cats

4.Mr. Black thinks the big hole is only for the____________.

A. the big cat               B. the small cat        C. Mr. Green

5.____________ is not necessary（必要的）.

A. The big hole             B. The small hole      C. The door