人教版高中英语：选修6 Unit 3 A healthy life 单元练习（含答案）
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| 名称 | 人教版高中英语：选修6 Unit 3 A healthy life 单元练习（含答案） |  | |
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| 资源类型 | 教案 | ||
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| 科目 | 英语 | ||
| 更新时间 | 2022-01-06 11:01:53 | ||
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6. 3 A healthy life
Ⅰ. 阅读理解
Sweetest Day is celebrated on the third Saturday in October as a day to make someone happy. It is an occasion which offers all of us an opportunity to remember not only the sick, the aged, and children who have lost their parents, but also friends, workmates, relatives and neighbors whose helpfulness and kindness we have enjoyed.
Over 60 years ago, when a Cleveland man noticed that some people, such as children who lost their parents and patients who lay in bed, too often felt forgotten and neglected,_he developed in his mind the idea of showing them that they were remembered. He did this by giving them small gifts. With the help of his friends and neighbors, he gave those people small gifts on a Saturday in October. During the years that followed, other Clevelanders began to take part in the celebration, which came to be called “Sweetest Day”. Over time, the idea of spreading cheer to the poor, the sick and children who had lost their parents was broadened to include everyone, and Sweetest Day became an occasion for remembering others with a kind act or a small gift. Soon the idea spread to other cities all over the USA.
Sweetest Day is not based on any single group’s religions(宗教的) beliefs or on a family relationship. It is a reminder that a thoughtful word or deed enriches life and gives it meaning.
Because for many people remembering takes the form of gift giving, Sweetest Day offers us the opportunity to show others that we care, in a positive way.
1. What can we learn from the first paragraph
A. Sweetest Day is celebrated on the third Sunday in October.
B. Sweetest Day is a day to make others happy.
C. Sweetest Day is an occasion for lovers to express love.
D. Sweetest Day is just an occasion to care about disabled people.
2. What does the underlined word “neglected” in the second paragraph mean
A. Remembered. B. Hated.
C. Ignored. D. Disappointed.
3. What’s the origin of Sweetest Day
A. A Cleveland man’s meeting with some people in need.
B. Giving gifts to each other’s beloved.
C. Kind acts performed to the poor.
D. Cleveland men’s religious beliefs.
4. Which of the following has little relationship to Sweetest Day
A. Visiting sick people of the hospital.
B. Visiting children who have lost their parents.
C. Giving friends small gifts.
D. Giving flowers to sweethearts.
It’s late in the evening, time to close the book and turn off the computer. You’re done for the day. What you may not realize, however, is that the learning process actually continues in your dreams.
It might sound like science fiction, but researchers are increasingly focusing on the relationship between the knowledge and skills our brains absorb during the day and the often strange imaginings they generate at night. Scientists have found that dreaming about a task we’ve learned improves performance in that activity(suggesting that there’s some truth to the popular idea that we’re “getting” a foreign language once we begin dreaming in it). What’s more, dreaming may be an essential part of understanding, organizing and retaining what we learn.
While we sleep, research indicates, the brain replays the patterns of activity it experienced during waking hours, allowing us to enter what one psychologist calls a neural(神经的) virtual reality. A vivid example of such replay can be seen in a video researchers made recently about sleep disorders. They taught a series of dance moves to patients suffering from sleepwalking and related conditions. They then videotaped the subjects as they slept. Lying in bed, eyes closed, one female patient on the tape performs the dance moves she learned earlier.
This shows that while our bodies are at rest, our brains are drawing what’s important from the information and events we’ve recently encountered, then integrating that material into the vast store of what we already know. In a 2010 study, researchers reported that college students who dreamed about a computer maze(迷宫) task they had learned showed a 10－fold improvement in their ability to find their way through the maze compared with participants who did not dream about the task.
That study’s chief researcher Herbert Smith suggested that studying right before bedtime or taking a nap following a study session in the afternoon might increase the probability of dreaming about the material. Think about that as you go to sleep tonight.
5. What happens when one enters a dream state
A. The body continues to act as if the sleeper were awake.
B. The neural activity of the brain will become intensified.
C. The brain once again experiences the learning activities of the day.
D. The brain behaves as if it were playing a virtual reality video game.
6. What does the brain do while we are sleeping
A. It replaces old information with new material.
B. It processes and absorbs newly acquired information.
C. It regroups information and places it in different files.
D. It systematizes all the information collected during the day.
7. How can learning be enhanced according to Herbert Smith
A. Staying up late before finally going to bed.
B. Having a period of sleep right after studying.
C. Having a dream about anything you are interested in.
D. Thinking about the chances of dreaming about the material.
8. What is the research discussed in the passage mainly about
A. How study affects people’s dreams.
B. Why people learn more after sleeping.
C. What time students should study and sleep.
D. How dreaming may lead to improved learning outcomes.
Ⅱ. 阅读填句
People are used to turning the handle on a sink and seeing a stream of clear water pour forth. But where does this water come from Typically, a town will pump it from a river or lake. __1__ That’s why a community will typically process that water—clean it—through a series of steps before sending it on to your faucet(龙头)．
The first step is usually to add chemicals that cause those solid bits to clump(结块) together. Even if those solids can’t hurt you, they could cloud water and give it a funny taste. __2__ Next, the water flows into big tanks where it will sit for a while. During this settling period, the solids begin to fall to the bottom. The cleaner water atop it then moves through membranes(薄膜). __3__ Following this disinfection(消毒) step, the water now is ready to flow through pipes to homes throughout a community.
__4__ They may add chemicals at different stages. Some may install(安装) an ion exchange system. They also vary the chemicals used, based on the qualities of the incoming local water.
Some water companies are streamlining their treatment process even more by installing technologies such as reverse osmosis(反渗透). __5__ Reverse osmosis can replace a number of steps in the water treatment process or reduce the number of chemicals added to water. But it’s expensive—out of reach for many cities.
A. This technique removes nearly every pollutant in water.
B. A gentle shaking of the water helps trap more air into it.
C. Different communities may make small changes in this process.
D. By making these bits clump, they become bigger and easier to remove.
E. Many families have to worry about their own cleanup and treatment.
F. Then the water is treated with chemicals to kill harmful bacteria and viruses.
G. But this water can host various bacteria and solids—waterborne dirt, rotting plant bits and more.
Ⅲ. 书面表达
假定你是李华，听说你的美国笔友Bella最近在通过节食来减肥。请根据所给提示用英语给她写一封邮件，内容包括：
1. 节食对健康的危害；
2. 就如何减肥给她提几点建议。
注意：1. 词数100左右；
2. 开头和结尾已给出，但不计入总词数；
3. 可以适当增加细节，以使行文连贯。
Dear Bella，
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours，
Li Hua
6. 3 A healthy life
Ⅰ. 阅读理解
Sweetest Day is celebrated on the third Saturday in October as a day to make someone happy. It is an occasion which offers all of us an opportunity to remember not only the sick, the aged, and children who have lost their parents, but also friends, workmates, relatives and neighbors whose helpfulness and kindness we have enjoyed.
Over 60 years ago, when a Cleveland man noticed that some people, such as children who lost their parents and patients who lay in bed, too often felt forgotten and neglected,_he developed in his mind the idea of showing them that they were remembered. He did this by giving them small gifts. With the help of his friends and neighbors, he gave those people small gifts on a Saturday in October. During the years that followed, other Clevelanders began to take part in the celebration, which came to be called “Sweetest Day”. Over time, the idea of spreading cheer to the poor, the sick and children who had lost their parents was broadened to include everyone, and Sweetest Day became an occasion for remembering others with a kind act or a small gift. Soon the idea spread to other cities all over the USA.
Sweetest Day is not based on any single group’s religions(宗教的) beliefs or on a family relationship. It is a reminder that a thoughtful word or deed enriches life and gives it meaning.
Because for many people remembering takes the form of gift giving, Sweetest Day offers us the opportunity to show others that we care, in a positive way.
1. What can we learn from the first paragraph
A. Sweetest Day is celebrated on the third Sunday in October.
B. Sweetest Day is a day to make others happy.
C. Sweetest Day is an occasion for lovers to express love.
D. Sweetest Day is just an occasion to care about disabled people.
2. What does the underlined word “neglected” in the second paragraph mean
A. Remembered. B. Hated.
C. Ignored. D. Disappointed.
3. What’s the origin of Sweetest Day
A. A Cleveland man’s meeting with some people in need.
B. Giving gifts to each other’s beloved.
C. Kind acts performed to the poor.
D. Cleveland men’s religious beliefs.
4. Which of the following has little relationship to Sweetest Day
A. Visiting sick people of the hospital.
B. Visiting children who have lost their parents.
C. Giving friends small gifts.
D. Giving flowers to sweethearts.
1. 答案 B 2. 答案 C 3. 答案 A 4. 答案 D
It’s late in the evening, time to close the book and turn off the computer. You’re done for the day. What you may not realize, however, is that the learning process actually continues in your dreams.
It might sound like science fiction, but researchers are increasingly focusing on the relationship between the knowledge and skills our brains absorb during the day and the often strange imaginings they generate at night. Scientists have found that dreaming about a task we’ve learned improves performance in that activity(suggesting that there’s some truth to the popular idea that we’re “getting” a foreign language once we begin dreaming in it). What’s more, dreaming may be an essential part of understanding, organizing and retaining what we learn.
While we sleep, research indicates, the brain replays the patterns of activity it experienced during waking hours, allowing us to enter what one psychologist calls a neural(神经的) virtual reality. A vivid example of such replay can be seen in a video researchers made recently about sleep disorders. They taught a series of dance moves to patients suffering from sleepwalking and related conditions. They then videotaped the subjects as they slept. Lying in bed, eyes closed, one female patient on the tape performs the dance moves she learned earlier.
This shows that while our bodies are at rest, our brains are drawing what’s important from the information and events we’ve recently encountered, then integrating that material into the vast store of what we already know. In a 2010 study, researchers reported that college students who dreamed about a computer maze(迷宫) task they had learned showed a 10－fold improvement in their ability to find their way through the maze compared with participants who did not dream about the task.
That study’s chief researcher Herbert Smith suggested that studying right before bedtime or taking a nap following a study session in the afternoon might increase the probability of dreaming about the material. Think about that as you go to sleep tonight.
5. What happens when one enters a dream state
A. The body continues to act as if the sleeper were awake.
B. The neural activity of the brain will become intensified.
C. The brain once again experiences the learning activities of the day.
D. The brain behaves as if it were playing a virtual reality video game.
6. What does the brain do while we are sleeping
A. It replaces old information with new material.
B. It processes and absorbs newly acquired information.
C. It regroups information and places it in different files.
D. It systematizes all the information collected during the day.
7. How can learning be enhanced according to Herbert Smith
A. Staying up late before finally going to bed.
B. Having a period of sleep right after studying.
C. Having a dream about anything you are interested in.
D. Thinking about the chances of dreaming about the material.
8. What is the research discussed in the passage mainly about
A. How study affects people’s dreams.
B. Why people learn more after sleeping.
C. What time students should study and sleep.
D. How dreaming may lead to improved learning outcomes.
5. 答案 C 6. 答案 B 7. 答案 B 8. 答案 D
Ⅱ. 阅读填句
People are used to turning the handle on a sink and seeing a stream of clear water pour forth. But where does this water come from Typically, a town will pump it from a river or lake. __1__ That’s why a community will typically process that water—clean it—through a series of steps before sending it on to your faucet(龙头)．
The first step is usually to add chemicals that cause those solid bits to clump(结块) together. Even if those solids can’t hurt you, they could cloud water and give it a funny taste. __2__ Next, the water flows into big tanks where it will sit for a while. During this settling period, the solids begin to fall to the bottom. The cleaner water atop it then moves through membranes(薄膜). __3__ Following this disinfection(消毒) step, the water now is ready to flow through pipes to homes throughout a community.
__4__ They may add chemicals at different stages. Some may install(安装) an ion exchange system. They also vary the chemicals used, based on the qualities of the incoming local water.
Some water companies are streamlining their treatment process even more by installing technologies such as reverse osmosis(反渗透). __5__ Reverse osmosis can replace a number of steps in the water treatment process or reduce the number of chemicals added to water. But it’s expensive—out of reach for many cities.
A. This technique removes nearly every pollutant in water.
B. A gentle shaking of the water helps trap more air into it.
C. Different communities may make small changes in this process.
D. By making these bits clump, they become bigger and easier to remove.
E. Many families have to worry about their own cleanup and treatment.
F. Then the water is treated with chemicals to kill harmful bacteria and viruses.
G. But this water can host various bacteria and solids—waterborne dirt, rotting plant bits and more.
1. 答案 G 2. 答案 D 3. 答案 F 4. 答案 C 5. 答案 A
Ⅲ. 书面表达
假定你是李华，听说你的美国笔友Bella最近在通过节食来减肥。请根据所给提示用英语给她写一封邮件，内容包括：
1. 节食对健康的危害；
2. 就如何减肥给她提几点建议。
注意：1. 词数100左右；
2. 开头和结尾已给出，但不计入总词数；
3. 可以适当增加细节，以使行文连贯。
Dear Bella，
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours，
Li Hua
参考范文
Dear Bella，
I am sorry to hear that you are on a diet to lose weight. As we all know, it is important to have a balanced diet including grain, fruit and vegetables. When you are on a diet, you don’t have enough energy to support your body. Now I’d like to offer you some advice.
First of all, you should have your meals on time instead of eating snacks. Second, it is a good idea to take enough physical exercise every day, which will help you to lose weight and stay energetic.
I hope my advice will be useful to you.
Yours，
Li Hua
Ⅰ. 阅读理解
Sweetest Day is celebrated on the third Saturday in October as a day to make someone happy. It is an occasion which offers all of us an opportunity to remember not only the sick, the aged, and children who have lost their parents, but also friends, workmates, relatives and neighbors whose helpfulness and kindness we have enjoyed.
Over 60 years ago, when a Cleveland man noticed that some people, such as children who lost their parents and patients who lay in bed, too often felt forgotten and neglected,_he developed in his mind the idea of showing them that they were remembered. He did this by giving them small gifts. With the help of his friends and neighbors, he gave those people small gifts on a Saturday in October. During the years that followed, other Clevelanders began to take part in the celebration, which came to be called “Sweetest Day”. Over time, the idea of spreading cheer to the poor, the sick and children who had lost their parents was broadened to include everyone, and Sweetest Day became an occasion for remembering others with a kind act or a small gift. Soon the idea spread to other cities all over the USA.
Sweetest Day is not based on any single group’s religions(宗教的) beliefs or on a family relationship. It is a reminder that a thoughtful word or deed enriches life and gives it meaning.
Because for many people remembering takes the form of gift giving, Sweetest Day offers us the opportunity to show others that we care, in a positive way.
1. What can we learn from the first paragraph
A. Sweetest Day is celebrated on the third Sunday in October.
B. Sweetest Day is a day to make others happy.
C. Sweetest Day is an occasion for lovers to express love.
D. Sweetest Day is just an occasion to care about disabled people.
2. What does the underlined word “neglected” in the second paragraph mean
A. Remembered. B. Hated.
C. Ignored. D. Disappointed.
3. What’s the origin of Sweetest Day
A. A Cleveland man’s meeting with some people in need.
B. Giving gifts to each other’s beloved.
C. Kind acts performed to the poor.
D. Cleveland men’s religious beliefs.
4. Which of the following has little relationship to Sweetest Day
A. Visiting sick people of the hospital.
B. Visiting children who have lost their parents.
C. Giving friends small gifts.
D. Giving flowers to sweethearts.
It’s late in the evening, time to close the book and turn off the computer. You’re done for the day. What you may not realize, however, is that the learning process actually continues in your dreams.
It might sound like science fiction, but researchers are increasingly focusing on the relationship between the knowledge and skills our brains absorb during the day and the often strange imaginings they generate at night. Scientists have found that dreaming about a task we’ve learned improves performance in that activity(suggesting that there’s some truth to the popular idea that we’re “getting” a foreign language once we begin dreaming in it). What’s more, dreaming may be an essential part of understanding, organizing and retaining what we learn.
While we sleep, research indicates, the brain replays the patterns of activity it experienced during waking hours, allowing us to enter what one psychologist calls a neural(神经的) virtual reality. A vivid example of such replay can be seen in a video researchers made recently about sleep disorders. They taught a series of dance moves to patients suffering from sleepwalking and related conditions. They then videotaped the subjects as they slept. Lying in bed, eyes closed, one female patient on the tape performs the dance moves she learned earlier.
This shows that while our bodies are at rest, our brains are drawing what’s important from the information and events we’ve recently encountered, then integrating that material into the vast store of what we already know. In a 2010 study, researchers reported that college students who dreamed about a computer maze(迷宫) task they had learned showed a 10－fold improvement in their ability to find their way through the maze compared with participants who did not dream about the task.
That study’s chief researcher Herbert Smith suggested that studying right before bedtime or taking a nap following a study session in the afternoon might increase the probability of dreaming about the material. Think about that as you go to sleep tonight.
5. What happens when one enters a dream state
A. The body continues to act as if the sleeper were awake.
B. The neural activity of the brain will become intensified.
C. The brain once again experiences the learning activities of the day.
D. The brain behaves as if it were playing a virtual reality video game.
6. What does the brain do while we are sleeping
A. It replaces old information with new material.
B. It processes and absorbs newly acquired information.
C. It regroups information and places it in different files.
D. It systematizes all the information collected during the day.
7. How can learning be enhanced according to Herbert Smith
A. Staying up late before finally going to bed.
B. Having a period of sleep right after studying.
C. Having a dream about anything you are interested in.
D. Thinking about the chances of dreaming about the material.
8. What is the research discussed in the passage mainly about
A. How study affects people’s dreams.
B. Why people learn more after sleeping.
C. What time students should study and sleep.
D. How dreaming may lead to improved learning outcomes.
Ⅱ. 阅读填句
People are used to turning the handle on a sink and seeing a stream of clear water pour forth. But where does this water come from Typically, a town will pump it from a river or lake. __1__ That’s why a community will typically process that water—clean it—through a series of steps before sending it on to your faucet(龙头)．
The first step is usually to add chemicals that cause those solid bits to clump(结块) together. Even if those solids can’t hurt you, they could cloud water and give it a funny taste. __2__ Next, the water flows into big tanks where it will sit for a while. During this settling period, the solids begin to fall to the bottom. The cleaner water atop it then moves through membranes(薄膜). __3__ Following this disinfection(消毒) step, the water now is ready to flow through pipes to homes throughout a community.
__4__ They may add chemicals at different stages. Some may install(安装) an ion exchange system. They also vary the chemicals used, based on the qualities of the incoming local water.
Some water companies are streamlining their treatment process even more by installing technologies such as reverse osmosis(反渗透). __5__ Reverse osmosis can replace a number of steps in the water treatment process or reduce the number of chemicals added to water. But it’s expensive—out of reach for many cities.
A. This technique removes nearly every pollutant in water.
B. A gentle shaking of the water helps trap more air into it.
C. Different communities may make small changes in this process.
D. By making these bits clump, they become bigger and easier to remove.
E. Many families have to worry about their own cleanup and treatment.
F. Then the water is treated with chemicals to kill harmful bacteria and viruses.
G. But this water can host various bacteria and solids—waterborne dirt, rotting plant bits and more.
Ⅲ. 书面表达
假定你是李华，听说你的美国笔友Bella最近在通过节食来减肥。请根据所给提示用英语给她写一封邮件，内容包括：
1. 节食对健康的危害；
2. 就如何减肥给她提几点建议。
注意：1. 词数100左右；
2. 开头和结尾已给出，但不计入总词数；
3. 可以适当增加细节，以使行文连贯。
Dear Bella，
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours，
Li Hua
6. 3 A healthy life
Ⅰ. 阅读理解
Sweetest Day is celebrated on the third Saturday in October as a day to make someone happy. It is an occasion which offers all of us an opportunity to remember not only the sick, the aged, and children who have lost their parents, but also friends, workmates, relatives and neighbors whose helpfulness and kindness we have enjoyed.
Over 60 years ago, when a Cleveland man noticed that some people, such as children who lost their parents and patients who lay in bed, too often felt forgotten and neglected,_he developed in his mind the idea of showing them that they were remembered. He did this by giving them small gifts. With the help of his friends and neighbors, he gave those people small gifts on a Saturday in October. During the years that followed, other Clevelanders began to take part in the celebration, which came to be called “Sweetest Day”. Over time, the idea of spreading cheer to the poor, the sick and children who had lost their parents was broadened to include everyone, and Sweetest Day became an occasion for remembering others with a kind act or a small gift. Soon the idea spread to other cities all over the USA.
Sweetest Day is not based on any single group’s religions(宗教的) beliefs or on a family relationship. It is a reminder that a thoughtful word or deed enriches life and gives it meaning.
Because for many people remembering takes the form of gift giving, Sweetest Day offers us the opportunity to show others that we care, in a positive way.
1. What can we learn from the first paragraph
A. Sweetest Day is celebrated on the third Sunday in October.
B. Sweetest Day is a day to make others happy.
C. Sweetest Day is an occasion for lovers to express love.
D. Sweetest Day is just an occasion to care about disabled people.
2. What does the underlined word “neglected” in the second paragraph mean
A. Remembered. B. Hated.
C. Ignored. D. Disappointed.
3. What’s the origin of Sweetest Day
A. A Cleveland man’s meeting with some people in need.
B. Giving gifts to each other’s beloved.
C. Kind acts performed to the poor.
D. Cleveland men’s religious beliefs.
4. Which of the following has little relationship to Sweetest Day
A. Visiting sick people of the hospital.
B. Visiting children who have lost their parents.
C. Giving friends small gifts.
D. Giving flowers to sweethearts.
1. 答案 B 2. 答案 C 3. 答案 A 4. 答案 D
It’s late in the evening, time to close the book and turn off the computer. You’re done for the day. What you may not realize, however, is that the learning process actually continues in your dreams.
It might sound like science fiction, but researchers are increasingly focusing on the relationship between the knowledge and skills our brains absorb during the day and the often strange imaginings they generate at night. Scientists have found that dreaming about a task we’ve learned improves performance in that activity(suggesting that there’s some truth to the popular idea that we’re “getting” a foreign language once we begin dreaming in it). What’s more, dreaming may be an essential part of understanding, organizing and retaining what we learn.
While we sleep, research indicates, the brain replays the patterns of activity it experienced during waking hours, allowing us to enter what one psychologist calls a neural(神经的) virtual reality. A vivid example of such replay can be seen in a video researchers made recently about sleep disorders. They taught a series of dance moves to patients suffering from sleepwalking and related conditions. They then videotaped the subjects as they slept. Lying in bed, eyes closed, one female patient on the tape performs the dance moves she learned earlier.
This shows that while our bodies are at rest, our brains are drawing what’s important from the information and events we’ve recently encountered, then integrating that material into the vast store of what we already know. In a 2010 study, researchers reported that college students who dreamed about a computer maze(迷宫) task they had learned showed a 10－fold improvement in their ability to find their way through the maze compared with participants who did not dream about the task.
That study’s chief researcher Herbert Smith suggested that studying right before bedtime or taking a nap following a study session in the afternoon might increase the probability of dreaming about the material. Think about that as you go to sleep tonight.
5. What happens when one enters a dream state
A. The body continues to act as if the sleeper were awake.
B. The neural activity of the brain will become intensified.
C. The brain once again experiences the learning activities of the day.
D. The brain behaves as if it were playing a virtual reality video game.
6. What does the brain do while we are sleeping
A. It replaces old information with new material.
B. It processes and absorbs newly acquired information.
C. It regroups information and places it in different files.
D. It systematizes all the information collected during the day.
7. How can learning be enhanced according to Herbert Smith
A. Staying up late before finally going to bed.
B. Having a period of sleep right after studying.
C. Having a dream about anything you are interested in.
D. Thinking about the chances of dreaming about the material.
8. What is the research discussed in the passage mainly about
A. How study affects people’s dreams.
B. Why people learn more after sleeping.
C. What time students should study and sleep.
D. How dreaming may lead to improved learning outcomes.
5. 答案 C 6. 答案 B 7. 答案 B 8. 答案 D
Ⅱ. 阅读填句
People are used to turning the handle on a sink and seeing a stream of clear water pour forth. But where does this water come from Typically, a town will pump it from a river or lake. __1__ That’s why a community will typically process that water—clean it—through a series of steps before sending it on to your faucet(龙头)．
The first step is usually to add chemicals that cause those solid bits to clump(结块) together. Even if those solids can’t hurt you, they could cloud water and give it a funny taste. __2__ Next, the water flows into big tanks where it will sit for a while. During this settling period, the solids begin to fall to the bottom. The cleaner water atop it then moves through membranes(薄膜). __3__ Following this disinfection(消毒) step, the water now is ready to flow through pipes to homes throughout a community.
__4__ They may add chemicals at different stages. Some may install(安装) an ion exchange system. They also vary the chemicals used, based on the qualities of the incoming local water.
Some water companies are streamlining their treatment process even more by installing technologies such as reverse osmosis(反渗透). __5__ Reverse osmosis can replace a number of steps in the water treatment process or reduce the number of chemicals added to water. But it’s expensive—out of reach for many cities.
A. This technique removes nearly every pollutant in water.
B. A gentle shaking of the water helps trap more air into it.
C. Different communities may make small changes in this process.
D. By making these bits clump, they become bigger and easier to remove.
E. Many families have to worry about their own cleanup and treatment.
F. Then the water is treated with chemicals to kill harmful bacteria and viruses.
G. But this water can host various bacteria and solids—waterborne dirt, rotting plant bits and more.
1. 答案 G 2. 答案 D 3. 答案 F 4. 答案 C 5. 答案 A
Ⅲ. 书面表达
假定你是李华，听说你的美国笔友Bella最近在通过节食来减肥。请根据所给提示用英语给她写一封邮件，内容包括：
1. 节食对健康的危害；
2. 就如何减肥给她提几点建议。
注意：1. 词数100左右；
2. 开头和结尾已给出，但不计入总词数；
3. 可以适当增加细节，以使行文连贯。
Dear Bella，
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours，
Li Hua
参考范文
Dear Bella，
I am sorry to hear that you are on a diet to lose weight. As we all know, it is important to have a balanced diet including grain, fruit and vegetables. When you are on a diet, you don’t have enough energy to support your body. Now I’d like to offer you some advice.
First of all, you should have your meals on time instead of eating snacks. Second, it is a good idea to take enough physical exercise every day, which will help you to lose weight and stay energetic.
I hope my advice will be useful to you.
Yours，
Li Hua