第三部分阅读（共两节，满分40分）
第一节阅读理解（共15小题；每小题2分，满分30分）
阅读下列短文，从每题所给的A、B、C和D项中，选出最佳答案。
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.
51. 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
52. 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 pul     D. to move away
53. 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
54. 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
55. 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.