During the day we work and play．And at night we sleep．Our bodies rest when we are asleep．In the morning，we are ready to work and play again．Our bodies grow most when we are asleep．

    Children who are tired usually need sleep．We could be better at our lessons if we had enough rest．Children who are eight or nine years old need ten hours of sleep every night．Our bodies need enough air when we sleep．If we don't get out fresh air，we will feel tired when we wake up．While in bed we mustn't cover our heads；our lungs(肺)need to get enough fresh air．If we opens windows at night，we can get enough fresh air．Cool air is better than warm air．

Children who want to be healthy must get enough sleep． 

1．Our bodies rest when we___________．

   A．work    B．sleep    C．play

2．Our bodies________ when We are asleep．

   A．don't grow    B．grow most    C．grow least

3．Children need_________ hours of sleep every night when they are eight nine years old．

   A．nine    B．eight    C．ten

4．If we don't get enough fresh air，we will feel _______ when we wake up．

   A tired    B．ill    C．excited

5．This passage mainly tells us that__________．

   A．children need ten hours of sleep every night

   B．when we sleep，our bodies need enough air

   C．children need enough sleep and how to sleep well