Sleeping1   For millions of years before the appearance of the electric light, shit work, all night cableTV and the Internet, earth's creatures evolved (进化) on a planet with a 24-hour cycle. Our biological clocks are set for this daily cycle. Simply, our bodies want to sleep at night and beawake during the day. Most women and men need between 8-8.5 hours of sleep a night to function properly throughout their lives.2  But on average, Americans sleep only about seven and a half hour per night, a marked drop from the nine hours they averaged in 1910. What's worse, nearly one third of all Americans get less than six hours of sleep on a typical work night. For most people, that's not nearly enough.3  Finding ways to get more and better sleep can be a challenge. Scientists have identified more than 80 different sleep disorders( 紊乱). Some sleeping disorders are genetic. But many problems are caused by staying up late and by traveling often between time zone or by working nights, Dr. James F. Jones at National Jewish Medical and Research Center in Denver says that sleepdisorders are often diagnosed (诊断) as other discomforts. About one third of the patients referred to him with possible chronic fatigue syndrome (慢性疲劳综合征) actually have treatable sleep disorders. "Before we do anything else, we look at their sleep," Jones says.4  Sleep experts say that most people would benefit from a good look at their sleep patterns ."My motto （座右铭) is ‘Sleep defensively'," says Mary Carskadon of Brown University. She says people need to find sufficient time to sleep, even if it means giving up other things. Going to bed and getting up at the same time every day are important.5 Pre-bedtime activities also make a difference. As with Eisner, who used to suffer from sleeplessness, a few life style changes---avoiding stimulants (刺激) and late meals, exercising hours before bedtime, relaxing with a hot bath-cause better sleep.前5道题选项：A. Sleeping patternsB. Sleeping cycleC. Sleeping disordersD. Sleeping timeE. Sleeping habitF. Sleeping activities后5道题选项：A. eating and drinking moreB. having enough sleepC. sleeping for 8-8.5 hoursD. taking a hot bathE. giving up other thingsF. staying up lateWe can make our bodies function properly by ____________.

Sleeping1 For millions of years before the appearance of the electric light, shit work, all-night cableTV and the Internet, earth's creatures evolved (进化) on a planet with a 24-hour cycle. Our biological clocks are set for this daily cycle. Simply, our bodies want to sleep at night and beawake during the day. Most women and men need between 8-8.5 hours of sleep a night to function properly throughout their lives.2  But on average, Americans sleep only about seven and a half hour per night, a marked drop from the nine hours they averaged in 1910. What's worse, nearly one third of all Americans get less than six hours of sleep on a typical work night. For most people, that's not nearly enough.3  Finding ways to get more and better sleep can be a challenge. Scientists have identified more than 80 different sleep disorders( 紊乱). Some sleeping disorders are genetic. But many problems are caused by staying up late and by traveling often between time zone or by working nights, Dr. James F. Jones at National Jewish Medical and Research Center in Denver says that sleepdisorders are often diagnosed (诊断) as other discomforts. About one third of the patients referred to him with possible chronic fatigue syndrome (慢性疲劳综合征) actually have treatable sleep disorders. "Before we do anything else, we look at their sleep," Jones says.4  Sleep experts say that most people would benefit from a good look at their sleep patterns. "My motto （座右铭) is‘Sleep defensively'," says Mary Carskadon of Brown University. She says people need to find sufficient time to sleep, even if it means giving up other things. Going to bed and getting up at the same time every day are important.5  Pre-bedtime activities also make a difference. As with Eisner, who used to suffer from sleeplessness, a few life style changes---avoiding stimulants (刺激) and late meals, exercising hours before bedtime, relaxing with a hot bath-cause better sleep.前5道题选项：A. Sleeping patternsB. Sleeping cycleC. Sleeping disordersD. Sleeping timeE. Sleeping habitF. Sleeping activities后5道题选项：A. eating and drinking moreB. having enough sleepC. sleeping for 8-8.5 hoursD. taking a hot bathE. giving up other thingsF. staying up lateFor most Americans, they are not ______________.

Sleeping1 For millions of years before the appearance of the electric light, shit work, all-night cableTV and the Internet, earth's creatures evolved (进化) on a planet with a 24-hour cycle. Our biological clocks are set for this daily cycle. Simply, our bodies want to sleep at night and beawake during the day. Most women and men need between 8-8.5 hours of sleep a night to function properly throughout their lives.2  But on average, Americans sleep only about seven and a half hour per night, a marked drop from the nine hours they averaged in 1910. What's worse, nearly one third of all Americans get less than six hours of sleep on a typical work night. For most people, that's not nearly enough.3  Finding ways to get more and better sleep can be a challenge. Scientists have identified more than 80 different sleep disorders( 紊乱). Some sleeping disorders are genetic. But many problems are caused by staying up late and by traveling often between time zone or by working nights, Dr. James F. Jones at National Jewish Medical and Research Center in Denver says that sleepdisorders are often diagnosed (诊断) as other discomforts. About one third of the patients referred to him with possible chronic fatigue syndrome (慢性疲劳综合征) actually have treatable sleep disorders. "Before we do anything else, we look at their sleep," Jones says.4  Sleep experts say that most people would benefit from a good look at their sleep patterns. "My motto （座右铭) is ‘Sleep defensively'," says Mary Carskadon of Brown University. She says people need to find sufficient time to sleep, even if it means giving up other things. Going to bed and getting up at the same time every day are important.5 Pre-bedtime activities also make a difference. As with Eisner, who used to suffer from sleeplessness, a few life style changes---avoiding stimulants (刺激) and late meals, exercising hours before bedtime, relaxing with a hot bath-cause better sleep.前5道题选项：A. Sleeping patternsB. Sleeping cycleC. Sleeping disordersD. Sleeping timeE. Sleeping habitF. Sleeping activities后5道题选项：A.eating and drinking moreB. having enough sleepC. sleeping for 8-8.5 hoursD. taking a hot bathE. giving up other thingsF. staying up lateSome sleeping disorders are caused by ________________.

Sleeping1  For millions of years before the appearance of the electric light, shit work, all night cableTV and the Internet, earth's creatures evolved (进化) on a planet with a 24-hour cycle. Our biological clocks are set for this daily cycle. Simply, our bodies want to sleep at night and beawake during the day. Most women and men need between 8-8.5 hours of sleep a night to function properly throughout their lives.2  But on average, Americans sleep only about seven and a half hour per night, a marked drop from the nine hours they averaged in 1910. What's worse, nearly one third of all Americans get less than six hours of sleep on a typical work night. For most people, that's not nearly enough.3  Finding ways to get more and better sleep can be a challenge. Scientists have identified more than 80 different sleep disorders( 紊乱). Some sleeping disorders are genetic. But many problems are caused by staying up late and by traveling often between time zone or by working nights, Dr. James F. Jones at National Jewish Medical and Research Center in Denver says that sleepdisorders are often diagnosed (诊断) as other discomforts. About one third of the patients referred to him with possible chronic fatigue syndrome (慢性疲劳综合征) actually have treatable sleep disorders. "Before we do anything else, we look at their sleep," Jones says.4  Sleep experts say that most people would benefit from a good look at their sleep patterns. "My motto （座右铭) is ‘Sleep defensively'," says Mary Carskadon of Brown University. She says people need to find sufficient time to sleep, even if it means giving up other things. Going to bed and getting up at the same time every day are important.5 Pre-bedtime activities also make a difference. As with Eisner, who used to suffer from sleeplessness, a few life style changes---avoiding stimulants (刺激) and late meals, exercising hours before bedtime, relaxing with a hot bath-cause better sleep.前5道题选项：A. Sleeping patternsB. Sleeping cycleC. Sleeping disordersD. Sleeping timeE. Sleeping habitF. Sleeping activities后5道题选项：A. eating and drinking moreB. having enough sleepC. sleeping for 8-8.5 hoursD. taking a hot bathE. giving up other thingsF. staying up lateMary said we should have enough time to sleep by ______________.

Sleeping1  For millions of years before the appearance of the electric light, shit work, all-night cableTV and the Internet, earth's creatures evolved (进化) on a planet with a 24-hour cycle. Our biological clocks are set for this daily cycle. Simply, our bodies want to sleep at night and beawake during the day. Most women and men need between 8-8.5 hours of sleep a night to function properly throughout their lives.2  But on average, Americans sleep only about seven and a half hour per night, a marked drop from the nine hours they averaged in 1910. What's worse, nearly one third of all Americans get less than six hours of sleep on a typical work night. For most people, that's not nearly enough.3  Finding ways to get more and better sleep can be a challenge. Scientists have identified more than 80 different sleep disorders( 紊乱). Some sleeping disorders are genetic. But many problems are caused by staying up late and by traveling often between time zone or by working nights, Dr. James F. Jones at National Jewish Medical and Research Center in Denver says that sleepdisorders are often diagnosed (诊断) as other discomforts. About one third of the patients referred to him with possible chronic fatigue syndrome (慢性疲劳综合征) actually have treatable sleep disorders. "Before we do anything else, we look at their sleep," Jones says.4 Sleep experts say that most people would benefit from a good look at their sleep patterns. "My motto （座右铭) is ‘Sleep defensively'," says Mary Carskadon of Brown University. She says people need to find sufficient time to sleep, even if it means giving up other things. Going to bed and getting up at the same time every day are important.5 Pre-bedtime activities also make a difference. As with Eisner, who used to suffer from sleeplessness, a few life style changes---avoiding stimulants (刺激) and late meals, exercising hours before bedtime, relaxing with a hot bath-cause better sleep.前5道题选项：A. Sleeping patternsB. Sleeping cycleC. Sleeping disordersD. Sleeping timeE. Sleeping habitF. Sleeping activities后5道题选项：A.eating and drinking moreB. having enough sleepC. sleeping for 8-8.5 hoursD. taking a hot bathE. giving up other thingsF. staying up lateIt can help you sleep better by__________.

Our Muscles①When we think of muscles, we might often picture a bodybuilder with big arm and leg muscles. But our muscles do not have to look like that to work well.②As a matter of fact, every time we write our name, we use the 20 different muscles in our hand. Every time our heart beats, we use the our cardiac muscle(心肌). When eat our food, we use our tongue muscles. We even use muscle when we open and close our eye. In fact, every time we move, we use some of the muscles in our body.③A muscle is made of tiny fibers are packed together to make a single muscle .We all have the same number of muscles about 700 or so. Men and women with big muscles simply have thicker bundles of fibers.④There are three different types of muscles in our body. Smooth muscles are the ones that we cannot control. They work quietly to keep our body running. Also, they are the oneself that help us to absorb our food. The cardiac muscle makes the heart pump blood in and out .Skeletal muscles are the ones that we can control. These are the muscles that we use to raise our handset, or ride our bicycles.⑤Even our face often uses muscles. But if we want to save our energy, try smiling instead of frowning. Remember that it takes him 17 muscles in our face to smile, but 43 muscles to frown!前5道题选项：A. What a muscle consists ofB. When we use our musclesC. How people think of musclesD. What kind of muscles we haveE. Why we have different musclesF. Why we should smile rather than frown后5道题选项：A. frowningB. a lot of fibersC. to digest foodD. to function properlyE. whenever we are happyF. whenever we do somethingParagraph①:____.

Our Muscles①When we think of muscles, we might often picture a bodybuilder with big arm and leg muscles. But our muscles do not have to look like that to work well.②As a matter of fact, every time we write our name, we use the 20 different muscles in our hand. Every time our heart beats, we use the our cardiac muscle(心肌). When eat our food, we use our tongue muscles. We even use muscle when we open and close our eye. In fact, every time we move, we use some of the muscles in our body.③A muscle is made of tiny fibers are packed together to make a single muscle .We all have the same number of muscles----about 700 or so .Men and women with big muscles simply have thicker bundles of fibers.④There are three different types of muscles in our body .Smooth muscles are the ones that we cannot control .They work quietly to keep our body running .Also, they are the oneself that help us to absorb our food .The cardiac muscle makes the heart pump blood in and out .Skeletal muscles are the ones that we can control .These are the muscles that we use to raise our handset, or ride our bicycles.⑤Even our face often uses muscles .But if we want to save our energy, try smiling instead of frowning .Remember that it Takeshi 17 muscles in our face to smile, but 43 muscles to frown!前5道题选项：A. What a muscle consists ofB. When we use our musclesC. How people think of musclesD. What kind of muscles we haveE. Why we have different musclesF. Why we should smile rather than frown后5道题选项：A. frowningB. a lot of fibersC. to digest foodD. to function properlyE. whenever we are happyF. whenever we do somethingParagraph②:____.

Our Muscles①When we think of muscles, we might often picture a bodybuilder with big arm and leg muscles. But our muscles do not have to look like that to work well.②As a matter of fact, every time we write our name, we use the 20 different muscles in our hand. Every time our heart beats, we use the our cardiac muscle(心肌). When eat our food, we use our tongue muscles. We even use muscle when we open and close our eye. In fact, every time we move, we use some of the muscles in our body.③A muscle is made of tiny fibers are packed together to make a single muscle. We all have the same number of muscles about 700 or so. Men and women with big muscles simply have thicker bundles of fibers.④There are three different types of muscles in our body. Smooth muscles are the ones that we cannot control. They work quietly to keep our body running. Also, they are the oneself that help us to absorb our food. The cardiac muscle makes the heart pump blood in and out. Skeletal muscles are the ones that we can control. These are the muscles that we use to raise our handset, or ride our bicycles.⑤Even our face often uses muscles. But if we want to save our energy, try smiling instead of frowning. Remember that it takes him 17 muscles in our face to smile, but 43 muscles to frown!前5道题选项：A. What a muscle consists ofB. When we use our musclesC. How people think of musclesD. What kind of muscles we haveE. Why we have different musclesF. Why we should smile rather than frown后5道题选项：A. frowningB. a lot of fibersC. to digest foodD. to function properlyE. whenever we are happyF. whenever we do somethingParagraph③:____.

Our Muscles①When we think of muscles, we might often picture a bodybuilder with big arm and leg muscles. But our muscles do not have to look like that to work well.②As a matter of fact, every time we write our name, we use the 20 different muscles in our hand. Every time our heart beats, we use the our cardiac muscle(心肌). When eat our food, we use our tongue muscles. We even use muscle when we open and close our eye. In fact, every time we move, we use some of the muscles in our body.③A muscle is made of tiny fibers are packed together to make a single muscle. We all have the same number of muscles about 700 or so. Men and women with big muscles simply have thicker bundles of fibers.④There are three different types of muscles in our body. Smooth muscles are the ones that we cannot control. They work quietly to keep our body running. Also, they are the oneself that help us to absorb our food. The cardiac muscle makes the heart pump blood in and out. Skeletal muscles are the ones that we can control. These are the muscles that we use to raise our handset, or ride our bicycles.⑤Even our face often uses muscles. But if we want to save our energy, try smiling instead of frowning. Remember that it takes him 17 muscles in our face to smile, but 43 muscles to frown!前5道题选项：A. What a muscle consists ofB. When we use our musclesC. How people think of musclesD. What kind of muscles we haveE. Why we have different musclesF. Why we should smile rather than frown后5道题选项：A. frowningB. a lot of fibersC. to digest foodD. to function properlyE. whenever we are happyF. whenever we do somethingParagraph④:____.

Our Muscles①When we think of muscles, we might often picture a bodybuilder with big arm and leg muscles. But our muscles do not have to look like that to work well.②As a matter of fact, every time we write our name, we use the 20 different muscles in our hand. Every time our heart beats, we use the our cardiac muscle(心肌). When eat our food, we use our tongue muscles. We even use muscle when we open and close our eye. In fact, every time we move, we use some of the muscles in our body.③A muscle is made of tiny fibers are packed together to make a single muscle. We all have the same number of muscles about 700 or so .Men and women with big muscles simply have thicker bundles of fibers.④There are three different types of muscles in our body. Smooth muscles are the ones that we cannot control. They work quietly to keep our body running. Also, they are the oneself that help us to absorb our food. The cardiac muscle makes the heart pump blood in and out. Skeletal muscles are the ones that we can control. These are the muscles that we use to raise our handset, or ride our bicycles.⑤Even our face often uses muscles. But if we want to save our energy, try smiling instead of frowning. Remember that it takes him 17 muscles in our face to smile, but 43 muscles to frown!前5道题选项：A. What a muscle consists ofB. When we use our musclesC. How people think of musclesD. What kind of muscles we haveE. Why we have different musclesF. Why we should smile rather than frown后5道题选项：A. frowningB. a lot of fibersC. to digest foodD. to function properlyE. whenever we are happyF. whenever we do somethingParagraph⑤:____.