We all know snails. They move very slowly. But do you know that much of the time snails don’t move at all? They’re in their shells（壳）— sleeping.

Hot sun will dry out a snail’s body. So as soon as it sees the hot sun, the snail draws its body into its shell and closes the opening with a thin cover. Then it goes to sleep. A snail will die in a heavy rain. So whenever it rains, it goes inside its shell house and goes to sleep. A snail can sleep for as long as it needs to. It can take a short sleep. Or it can sleep for days at a time. And it spends all the winter months in its shell.

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. It can’t see very well. Its eyes, at the ends of the top feelers（触角）are very weak. But its sense of smell is very strong. It helps the snail to the new greens. Then the snails little mouth goes to work.

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

Mostly, a snail looks for food at night: But on cloudy days it eats in the daytime. It eats all day long. A snail can go on eating for hours and never feel full.

【小题1】A snail .

A．moves all the time

B．is afraid of hot and wet weather

C．doesn’t like sleeping

D．moves very slowly in winter

【小题2】A snail .

A．has bad sense of sight	B．has a big mouth
C．sees with its top feelers	D．has a 3-inch-long body

【小题3】From the passage, we know .

A．a snail’s shell helps itself a lot	B．a snail looks for food with its eyes
C．a snail’s teeth are too small to do their work	D．a snail’s body changes with the seasons

【小题4】The sentence “If you put a snail in a hard paper box, it will eat its way out” means “If a snail is put in a hard paper box, it will ”.

A．lose its way	B．make a hole and go out
C．eat green food	D．go out of the box with its feelers

【小题5】Which of the following is NOT TRUE?

A．A snail often looks for food at night.	B．A snail never feels full when eating.
C．A snail won’t take a long sleep.	D．A snail has many teeth.

【小题6】From the passage, we know .

A．a snail can protect itself	B．a snail can never escape
C．a snail can eat in its shell	D．a snail is easy to attack others