Scientists （科學(xué)家） are trying to make the deserts （沙漠） into good land again. They want to bring water to the deserts, so people can live and grow food. They are learning a lot about the deserts. But more and more of the earth is becoming deserts all the time. Scientists may not be able to change the deserts. Scientists think that people make deserts. People are doing bad things to the earth.

Some places on the earth don’t get much rain. But they still don’t become deserts. This is because some green plants are growing there. Small green plants and grass are very helpful to dry (干旱的)places. Plants don’t let the hot sun make the earth even drier. Plants don’t let the wind blow the earth away. When a little bit of rain falls, the plants hold the water. Without plants, the land can become deserts much more easily.

1.Why can the land become deserts?

A. Some places don’t get much rain.

B. Plants don’t let the hot sun make the earth even drier.

C. People don’t keep the earth well.

D. Scientists haven’t learnt enough about the deserts.

2.Scientists are???????? to make the deserts into good land again.

A. carrying water? B. growing food? C. doing nothing????????????? D. studying a lot

3.Which is NOT true?

A. The land never stops becoming deserts.

B. Scientists ask people to live in the deserts and grow food there.

C. People do bad things to the earth.

D. Scientists may not be able to change the deserts.

4.Why are green plants and grass helpful?

A. They can hold the water.?

B. They can keep the earth wet.

C. They can stop the wind from blowing the earth away.

D. All the above.

5.Which is the best title（題目）for the passage?

A. The Desert Problem?????????

B. People Make Deserts

C. Green Plants and Grass???????

D. The Deserts, the Tree and the Water

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（遷移）is probably the migration of the fish which is called “salmon”.This fish is born in fresh 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 bccome too crowded. They move down to the low land. Sometimes they move all the way the seadide,and many of them are killed when they fall into the sea.
Recently, scientists have studied the migration of kind of lobster（龍蝦）.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 know 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.
【小題1】Most animals move from one place to another at a certain time to _____
A.give birth        B.enjoy warmer weather   C.find food more easily
【小題2】The fish called “salmon”spends a long time in____
A.salt water        B.rivers                 C.fresh water
【小題3】The mice in northern Europe move when_____
A.they give birth   B.the place gets too crowded
C.they haven’t enough food
【小題4】The lobsters move_______.
A.to the fresh water   B.at a certain time  C.to find more food
【小題5】What is the main idea of the passage?
A.Animals move to find food more easily.
B.The migration of the fish called“salmon”is the most famous migration.
C.Sometimes we know why and how living things move from one place to another,but sometimes we don’t.

A. they should spend sometime
B. the students are not expected
C. they had so many choices
D. many of them told me
E. many of them expressed disappointment
In my spoken English class, I asked the students about their university life. To my surprise, 【小題1】. After their highly controlled(控制) high school lives, they were having difficulty getting used to (習(xí)慣) the free time in the university. When I asked them to describe their high school lives, 【小題2】they got up at six in the morning and studied until ten or even later at night. Most of this time was spent doing lots of homework.
When they entered the university, in my opinion,【小題3】to spend all their waking hours studying. They should also take an active part in social activities. They should learn to divide their time outside of class between sport sand clubs. What’s more, 【小題4】watching TV and chatting with their roommates. But what surprised me most was that many of them did not seem happy because【小題5】. They felt that they should be doing something else what ever they were doing. That’s why they were not happy.
To those students, my advice is: Get used to it and learn to make decisions for yourselves.