Question

【题目】 We usually have a good mood if we sleep enough at night. Otherwise, sometimes we will feel sad. What’s more, sleep also influences our study or work.

You might be asleep but part of your brain is not. It’s carefully keeping time for you. In the morning, a thing called PER is released (释放), which slowly wakes you up, often right before your alarm clock is set to go off. Sleep-talking can include some broken noises or complete sentences. About 5 percent of adults do it. It happens to children more often. And fever, stress, worries or sadness may lead to it.

Most people grind ( 磨 碎 ) their teeth while they are asleep, at least sometimes. An unusual bite or even sleep apnea ( 窒 息 ) may lead to this habit. Most people are not aware of this until the doctor tells them. If you harm your teeth at night, your dentist can give you a mouth guard to prevent it.

You think you’re resting, but your brain is doing some serious housekeeping every single night. While you are asleep, your brain clears out some memories and organizes others again. The brain also cleans itself and moves away unnecessary and harmful things.

Your muscles ( 肌 肉 ) are frozen for part of every night. In fact, it’s okay to be paralyzed ( 瘫 痪 的 ) during sleep. During rapid eye movement (REM) sleep, your brain is busy dreaming. To prevent yourself from acting to the dreams, our body’smuscles will be paralyzed. It’s possible to wake up during the end of this cycle and be awake but unable to move. These usually pass quickly.

Each night you lose about a pound because of the water vapor ( 蒸 汽 ) while breathing. So it is the most pleasant for you to weigh yourself in the morning. Take advantage of it!

Title: What our bodies are【1】with at night
Importance of sleep	Sleep【2】our work, study as well as our moods.
Keeping time & talking	● PER can often slowly 【3】you up right before the alarm clock. ● Fever, stress, worries or sadness can【4】sleep-talking.
Grinding 【5】	Most people don’t【6】this until the doctor tells them.
Cleaning your brain	The brain can not only【7】out but also organize some memories.
Getting paralyzed	● You don’t【8】to the dreams while being paralyzed. ● It’s okay for muscles to be paralyzed, but it won’t【9】 long.
Dropping pounds	You will be a little【10】if you weigh yourself in the morning.

Answer 1

【答案】

【1】busy

【2】influences

【3】wake

【4】cause

【5】teeth

【6】realize/know

【7】clear

【8】act

【9】last

【10】lighter

【解析】

本文主要介绍夜里睡觉时我们的身体会有什么变化。

【1】这是本文的标题也就是主旨。本文主要讲的就是夜里睡着时身体会有不同的变化。be busy with sth忙于某事; What our bodies are busy with at night我们的身体在晚上忙什么。故答案是busy。

【2】根据第一段What’s more, sleep also influences our study or work可知睡眠会影响我们的工作，学习和情绪。influence 影响，动词；主语是sleep，所以用第三人称单数形式，故答案是influences。

【3】根据第二段In the morning, a thing called PER is released (释放), which slowly wakes you up, often right before your alarm clock is set to go off.可知PER会在闹钟响之前，叫醒你。wake sb up 叫醒某人；情态动词can后加动词原形，故答案是wake。

【4】根据第二段And fever, stress, worries or sadness may lead to it.这里的it指代的是sleep-talking，所以此空填lead to 的同义词cause，引起，故答案是cause。

【5】第三段的第一句Most people grind ( 磨 碎 ) their teeth while they are asleep, at least sometimes.是本段的主旨句，大多数人在睡觉时，都会磨牙；grind teeth磨牙，故答案是teeth。

【6】根据第三段Most people are not aware of this until the doctor tells them.可知大多数人不会意识到自己会磨牙，直到医生告诉他们。此处填be aware of 的同义词realize或know，故答案是realize/know。

【7】根据第四段While you are asleep, your brain clears out some memories and organizes others again. 当你睡着的时候，你的大脑会清除一些记忆并重新组织其他的记忆，clear out清理，故答案是clear。

【8】根据第五段To prevent yourself from acting to the dreams, our body’smuscles will be paralyzed.可知当你处于瘫痪状态时，你不会对梦想采取行动。故答案是act。

【9】根据第五段These usually pass quickly.可知睡觉时肌肉瘫痪没关系，但是这些会很快过去，不会持续很长时间，故答案是last。

【10】根据最后一段Each night you lose about a pound because of the water vapor ( 蒸 汽 ) while breathing.可知 每晚呼吸时会蒸发一磅的水，所以早上的时候体重会轻一点，故答案是lighter。