during the day和in the day都有在白天，一天中的意思，但during the day强调整个期间都在从事某件事 但in the day是指在白天干过某事，没有强调整个期间~

During the day we work and play; at night we sleep. Our bodies rest while we sleep. In the morning

1、 C While we are asleep our bodies grow most
2、 B Cool air is better then warm air.
3、 C Boys and girls must get enough sleep if they want to grow and be strong

in the daytime和during the day

in the daytime在白天
during the day在一天中，包括白天和晚上

选择正确的答案: During the day we work and play ,and at night we sleep .Our body r

1. C sleeping
答案可从文中句子找到：Our body grows most when we are asleep .
2. A tired
文中的句子Children who are tired usually need sleep.累透的的孩子通常需要睡眠，也就是说缺少睡眠会让人容易累。
3. B Not enough fresh air.
答案可从文中句子找到：If we do not get enough fresh air , we will feel tired when we wake up
4.C 10 hours
答案可从文中句子找到：Boys and girls of eight or nine years old need ten hours of sleep every night
5. A Fresh air
答案可从文中句子找到：While in bed we must not cover (覆盖)our head , our lungs need to get enough fresh air .