Enough sleep is very important for people's health.Most of time we work in the day time and sleep

at night.Our body rests while we sleep.In the morning we are ready to work and play again.Our body

grows most while we are sleeping.Children usually need more sleep.We can learn our lessons better

after we have enough rest.Boys and girls at the age of eight or nine should sleep ten hours every night.

When we sleep,our body needs fresh air,so we'd better sleep with our windows open.While in bed

we must not cover our head.If you want to be strong,you must get plenty of sleep and fresh air.

1.When we sleep,our body is ________.

A.still working

B.resting

C.playing

D.dreaming

2.The best title for this passage is "________."

A.Boys and girls

B.Sleep

C.Rest

D.How to be strong

3.What does our body need when we sleep?

A.Fresh air.

B.Warm air.

C.Rest

D.Both A and C

4.________ can help children grow up well.

A.Enough fresh air

B.Enough rest and play

C.Enough sleep

D.Both A and C

5.We need to open our windows when we sleep,don't we?

A.No,we don't.

B.No,we needn't.

C.Yes,we do.

D.Yes,we need.