We all know snails.They move very slowly.But do you know tha

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 snail's 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.
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 all the winter months.
2.A snail _____.
A.has not good sense of smell,but good sense of sight
B.has a big mouth,with many teeth in it
C.sees the outside world with its top feelers clearly
D.has a 3-inch-long body
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
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 in the box and then go out
C.eat green food
D.go out of the box with its feelers
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 will take a long sleep after it takes a short one.
D.A snail has two hundred and fifty-six thousand teeth.
6.From the passage,we know_____.
A.a snail can protect itself
B.a snail is a small animal with many teeth
C.a snail is an animal eating in its shell
D.Both A and B.

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