People work in the daytime and have a rest at night.S_____ they rest in the middle of the day.

People work in the daytime and have a rest at night.S_____ they rest in the middle of the day.
People work in the daytime and have a rest at night.S_____ they rest in the middle of the day.Our bodies rest when we sleep .We are ready to w____ and play again.
Children who are tired usually need sleep .They can do well in their lessons a____ they have enough rest.Children who are eight or nine years old need ten h____ of sleep every night .Their bodies need enough air w___ they sleep .if they do not get enough fresh air,they will f___ tired the next morning .While in bed they must not cover(盖）their h____ because it's not good for their bodies.if they open the windows at night,they can have l____ of fresh air.That's to say,cool air is b___ than warm air.Boys and girls who want to be strong enough have to get enough sleep.
if you know these things,you may become h___ than before.
S______ w_______ a_______
h______ w_______ f_______
h______ l_______ b_______
h______