英语首字母填空专项练习及答案

（一）

积极Sleep is not the same every night. We experience some deep sleep and some active sleep(

睡眠), which is when dreams happen. You might think sleepwalking(梦游) would happen in active sleep, but a person isn't physically active d 86 active sleep. Sleepwalking usually happens in the first few hours of sleep in the stage called slow-wave(慢波)or deep sleep. Not all sleepwalkers a 87 walk. Some simply sit up or stand in bed or act like they're awake when, in fact, they're asleep! Most, however, do get up and move around for a few seconds or for as long as half an hour.

Sleepwalkers' e 88 are open, but they don't see the same way they do when they're awake and often think they're in different rooms of the house or different places altogether. Sleepwalkers tend(往往会) to go back to bed on their own and they won't r 89 it in the morning. Doctors say sleepwalking sometimes occurs when a person is sick, has a fever, is not getting e 90 sleep, or is stressed. If sleepwalking occurs frequently, every night or so, it's a good idea for your mom or dad to take you to see your doctor. But occasional(偶然的) sleepwalking generally isn't something to worry about, a 91 " it may look funny or even scary (惊恐的) for the people who see a sleepwalker in action.

It's important, of course, that the person is kept safe. Precautions(预防措施) should be t 92

so the person is less likely to fall down, run into something, or walk out the front door while sleepwalking.

（二）

Everyone needs sleep. In fact, all living things need sleep. Having a sound and good rest m_____86_____ us healthy. It is believed that our brain develops best during sleep. It helps all our systems work well w_____87_____ we are awake. Sleep allows our brain to reorganize all events during the day and will improve our memory development.

For a student, eight to ten hours of sleep is required to give him or her e_____88_____ for the following day. A good sleep allows them to grow physically and mentally (心理上).

With e_____89_____ sleep at night, students would be able to wake up early and be ready for school activities. They will be able to listen carefully in class and would have the ability to memorize the things that they learn and r_____90_____ them in the future.

Eight hours of sleep makes students active t_____91_____ the whole day at school. They would be able to perform well in class, take down notes and finish their homework. When they have slept well, they can e_____92_____ understand their lessons. Good sleep prepares them well for the challenges (挑战) at school, from paperwork to sports. They will be ready to solve difficult tasks that