根据短文内容，用方框中所给词填空，每词限用一次。 play, lessons, h

根据短文内容，用方框中所给词填空，每词限用一次。

During the day we work and play，and at night we sleep. Our body     81   when we sleep. In the morning we are ready to work and     82    again. Our body grows most    83   we are asleep. Children who are    84    usually need sleep. We can get better at our    85  

after having plenty of rest. Boys and girls who are eight or nine years old need ten    86   of sleep every night. Our body needs plenty of air when we are asleep.   87   we do not get enough fresh air, we will feel tired when we wake up. While in bed we must not cover our head because our lungs need to get enough fresh air. If we open our    88   at night，we can have plenty of fresh air. Cool air is    89   than warm air. Boys and girls who want to be    90   must get plenty of sleep.

81. __________ 82. __________ 83. __________ 84. __________ 85. __________

86. __________ 87. __________ 88. __________ 89. __________ 90. __________

81. rests             82. play              83. when        84. tired              85. lessons

            86. hours              87. If                  88. windows   89. better            90. strong