Trees are useful to man in three very important ways. The first important way is that they provide man with food, wood and other products. Trees provide not only man with food, but also many animals with food. Without trees many animals could not live on the earth. It’s not easy for man to live on the earth, either.
The second important way is that trees give us shade. On a hot summer day, people are eager(渴望)to have a rest under the shade of a tree after they have walked a long way. You can imagine how important the shade of a tree is to man and to animals.
The third important way is that trees help to prevent drought and foods. However, in many parts of the world, man has not realized the third important way. He has cut trees down in large numbers. In the end he finds that he has lost the best friends he had.

The Importance of Trees

The First Important Way: 【小题1】____________________ _________________________

The Second Important Way: To give man shade

The Third Important Way: 【小题2】______________________ _________________________

We’ve talked about snails (蜗牛) and their slow move. But much of the time snails don’t move at all. They are in their shells (壳) —sleeping.

Hot sun will dry out a snail’s body. So at the least sign of hot sun, a snail draws its body into his shell. A snail will die in a heavy rain. So when it rains, a snail does the same thing, too. A snail can sleep for as long as it needs to. It spends all the winter months in its shell, asleep.

In the spring the snail wakes up. Its body, about three inches long, comes out from the shell. When hungry, the snail looks for food. Its eyes, at the end of the top feelers (触角), are very weak. But its sense (感觉) of smell is very strong. It helps the snail to find food and the new greens.

A snail’s mouth is no bigger than the point of a pin (大头针). Yet it has 256,000 teeth! The teeth are very small, and you can’t see them. If you put a snail in a hard paper box, it will eat its way out! And if a snail wears out its teeth, it will grow new ones.

1. A snail _________.

　 A. moves more slowly at night　　B. has thousands of feet

C. doesn’t move at all   　　      D. sleeps much of the time

2. In the sentence “A snail draws its body into its shell”, the word “draw” means _____.

　 A. to make with a pencil     B. to push　　C. to pull      D. to move away

3. From the story, we know _________.

　 A. a snail’s shell is very thin     B. a snail can’t see well

　 C. a snail’s nose is quite short    D. a snail’s body changes in different seasons

4. A snail goes to sleep when _____.

　 A. it feels hungry   B. it is put into a paper box  C. spring is coming   D. it rains heavily

5.Which of the following is wrong?

A. In winter the snail doesn’t eat or move.　　B. A snail doesn’t like living under the sun

C. The snail’s teeth can’t be worn out.       D. The snail’s nose helps to find food.

One day an old man is selling (卖) a big elephant. A young man comes to the elephant and begins to look at it slowly. The old man goes up to him and says in his ear, “Don't say anything about the elephant before I sell it. Then I will give you twenty dollars.” “All right,” says the young man. After the old man sells the elephant, he gives the young man twenty dollars and says, “Now, can you tell me how you found the elephant's bad ears?” “I didn't find the bad ears,” says the young man. “Then why are you looking at the elephant slowly?” asked the old man. The young man answers, “Because I have never seen an elephant before, and I want to know what it looks like.”

根据短文选择正确的答案

(　 )11. ________  the elephant.

　　　 A. The young man sells     B. The old man sells

　　　 C. The two men sell        D. The old man buys

(　 )12. The young man is looking at the elephant slowly.

He wants to find out ___________.

　　　 A. which foot of the elephant is bad B. how heavy it is

　　　 C. which ear of the elephant is bad D. what it looks like

(　 )13. The young man   ______________.

　　　 A. knows the elephant has bad ears B. wants to buy the elephant

　　　 C. looks after the elephant D. gets some money from the old man

(　 )14. The young man  ______________.

　　　 A. is not interested in elephants B. knows what an elephant looks like

　　　 C. has seen some elephants before D. has never seen an elephant before

(　 )15. Hearing what the young man said, the old man will probably(很可能)be ____________.

　　　 A. angry （生气）      B. happy     C. dangerous      D. hungry

--Where is Mary? I'd like to have a talk with her.

　　--She _______________the library. You can find her there.

　　A. has been to　　　　B. has gone to　　　 C. has left　　　D. will leave

 The director wants to make sure no one will solve the mystery until it ________ at the end of the horror film.

A. is explained  B. will be explained        C. explains　          D. has explained