阅读理解During the day we work and play，and at night we sleep. Our body rests when we sleep. In the morning we are ready to work and play again. Our body grows most when we are asleep. Children who are tired usually need sleep. We can get better at our lessons after having plenty of rest. Boys and girls who are eight or nine years old need ten hours of sleep every night. Our body needs plenty of air when we are asleep. If we do not get enough fresh air, we will feel tired when we wake up. While in bed we must not cover(覆盖) our head，our lungs need to get enough fresh air. If we open our windows at night，we can have plenty of fresh air. Cool air is better than warm air1.Our body grows most while we are _______A.eatingB.playingC.sleeping2.Too little sleep makes us _______A.tiredB.hungryC.happy3.—What may cause us to feel tired in the morning?—_______ during the sleepA.Too much airB.Not enough fresh airC.Too much cold air4.How many hours of sleep should 9-year-old children have every night?A.8 hoursB.9 hoursC.10 hours5.What do the lungs need most?A.Fresh airB.ExerciseC.Warm air
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CABCA解析1.根据Our body grows most while we are asleep.描述可知选C。2.根据If we do not get enough fresh air, we will feel tired when we wake up.及上文描述可知如果睡眠不足可导致劳累，故选A。3.根据If we do not get enough fresh air, we will feel tired when we wake up.可知选B。4.根据Boys and girls who are eight or nine years old need ten hours of sleep every night.描述可知选C。5.根据Our lungs need to get enough fresh air.描述可知选A。