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.

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完形填空。

　　There is a little duck. His name is Becky. Every day Becky and his mother go to a small 　1　. Becky's mother likes swimming in it. But Becky sits on the bank and 　2　 his mother swim.

　　His mother calls him, “Becky, it's time for you to 　3　 to swim.” Becky puts his foot in the water and says, “The water is too 　4　.” “Yes, Becky,” says his mother. “It is cold, but you must learn to swim.”

　　“I don't like it,” says Becky. “I'm not going to swim.” “But all ducks swim,” says his mother. “Not this duck,” answers Becky. 　5　 he sits down on a pile of sand and watches his mother swim.

　　One day, Becky's mother calls, “　6　, Becky. I see a big cat.” Becky sees the cat. It is a big cat. “Run fast,” calls his mother. Becky runs fast. “　7　 into the waterl” calls his mother. Becky jumps into the water. SPLASH！ He tries 　8　

to swim to his mother.

　　“You are 　9　 now,” says his mother. The cat can't swim, so he can't 　10　

Becky. Good boy, Becky. You can swim now,” says his mother. “Yes, Mum. I am glad I can swim,” says Becky.

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