Do you know why you sleep? You may think it’s because you’re tired. Or perhaps you’ve been told sleep is good for you. Yet no one knows exactly why or how people sleep.

Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist watched people sleep. He noticed that during periods of between 5 and 30 minutes each, sleepers’ eyes made rapid movements, as if they were watching something. He called these periods REM sleep, for Rapid Eye Movement. Periods when sleepers’ eyes did not move he called non-REM sleep.

Whenever the scientist woke people during REM sleep, they were having vivid dreams. Measurements showed that sleepers’ pulses（脉搏）went up quickly during REM sleep. Their breathing, heartbeat, and the blood going to the brain also increased. Far from being a time of rest, REM sleep is a time when the body is hard at work. Scientists still don’t know the reason for this. Some believe REM sleep makes learning easier. Babies spend a lot of time in REM sleep. Because of this, some scientists believe that REM sleep helps the brain grow. Others think REM sleep is a time for the brain to empty the day’s garbage.

One thing all the scientists agree on is that sleep is necessary. Without enough sleep, people make mistakes. Most major car accidents happen during the early morning hours, when people are sleepiest.

1.During REM sleep, a person’s breathing and heartbeat ________.

A．stop   B．increase     C．decrease   D．stay the same

2.Which word in paragraph（段落）3 means “colorful and lively”?

A．easier         B．empty         C．vivid   D．quickly

3.Which paragraph tells what happens when people don’t get enough sleep?

A．1         B．2         C．3         D．4

4.What is the main idea of the article?

A．REM sleep helps the brain grow.

B．REM sleep has been watched and recorded by scientists.

C．REM sleep is a time to empty the day’s garbage.

D．REM sleep is an active time when the body is hard at work.

5.You can decide from the article that REM sleep ________.

A．has a restful effect on people

B．can be avoided with lots of sleep

C．is something that all people experience

D．is something that all scientists agree on

 

When I crossed a small road on my first day in Kolkata, I was surprised because I heard a bell-not a horn (喇叭),  It was a tiny man pulling a rickshaw, He stopped and picked up two children from the front door of their house and pulled them to school. For many people, the rickshaw in Kolkata has many advantages, When the traffic is bad, rickshaws find a way through the traffic. If your miss your bus and there aren't any taxis, you can always find a rickshaw in Kolkata. Rickshaws are from your house to the market and waits for you. Then he loads (装载)all your things, drops you off outside your home and helps you unload, No other type of public transport offers this kind of service.
From June to September, Kolkata gets heavy rain. Sometimes it rains for 48 hours without a break. In some parts of the city, the roads flood (水淹), and anything with an engine(发动机) is useless, But the rickshaw drivers never stop working, even with water all around them.
But not everyone thinks rickshaws are a good thing. The local government want to ban rickshaws. They believe it is wrong for one man to pull another person when there is modern transport in the city. However, there is a problem with this plan. Many of the rickshaw drivers come from the countryside. The only job they can find in Kolkata is pulling a rickshaw, If the city bans rickshaws, these men won't have a job. So for the moment, the people of Kolkata still go by rickshaw.
【小题1】What is the main idea of Paragraph 1?

A．The rickshaw drivers carry things for local people in Kolkata.

B．Parents need rickshaws for taking children to school in Kolkata.

C．Rickshaws can find a way through the bad traffic in Kolkata.

D．Rickshaws are very useful for the people' s daily life in Kolkata.

【小题2】What does the underlined word "ban" mean?

A．make

B．increase

C．forbid

D．collect

【小题3】What can we learn from the passage?

A．The rickshaws in Kolkata have loud horns.

B．The rickshaw is still a part of public transport in Kolkata.

C．The local government offer many other jobs to the rickshaw driven.

D．The people in Kolkata are supposed to take rickshaws instead of cars.

When I crossed a small road on my first day in Kolkata, I was surprised because I heard a bell-not a horn (喇叭),  It was a tiny man pulling a rickshaw, He stopped and picked up two children from the front door of their house and pulled them to school. For many people, the rickshaw in Kolkata has many advantages, When the traffic is bad, rickshaws find a way through the traffic. If your miss your bus and there aren't any taxis, you can always find a rickshaw in Kolkata. Rickshaws are from your house to the market and waits for you. Then he loads (装载)all your things, drops you off outside your home and helps you unload, No other type of public transport offers this kind of service.

    From June to September, Kolkata gets heavy rain. Sometimes it rains for 48 hours without a break. In some parts of the city, the roads flood (水淹), and anything with an engine(发动机) is useless, But the rickshaw drivers never stop working, even with water all around them.

    But not everyone thinks rickshaws are a good thing. The local government want to ban rickshaws. They believe it is wrong for one man to pull another person when there is modern transport in the city. However, there is a problem with this plan. Many of the rickshaw drivers come from the countryside. The only job they can find in Kolkata is pulling a rickshaw, If the city bans rickshaws, these men won't have a job. So for the moment, the people of Kolkata still go by rickshaw.

1.What is the main idea of Paragraph 1?

A. The rickshaw drivers carry things for local people in Kolkata.

B. Parents need rickshaws for taking children to school in Kolkata.

C. Rickshaws can find a way through the bad traffic in Kolkata.

D. Rickshaws are very useful for the people' s daily life in Kolkata.

2.What does the underlined word "ban" mean?

A. make       B. increase     C. forbid      D. collect

3.What can we learn from the passage?

A. The rickshaws in Kolkata have loud horns.

B. The rickshaw is still a part of public transport in Kolkata.

C. The local government offer many other jobs to the rickshaw driven.

D. The people in Kolkata are supposed to take rickshaws instead of cars.

 

When I crossed a small road on my first day in Kolkata, I was surprised because I heard a bell-not a horn (喇叭). It was a tiny man pulling a rickshaw(人力黄包车).He stopped and picked up two children from the front door of their house and pulled them to school. For many people, the rickshaw in Kolkata has many advantages. When the traffic is bad, rickshaws find a way through the traffic. If your miss your bus and there aren't any taxis, you can always find a rickshaw in Kolkata. Rickshaws are from your house to the market and waits for you. Then he loads (装载)all your things, drops you off outside your home and helps you unload. No other type of public transport offers this kind of service.

    From June to September, Kolkata gets heavy rain. Sometimes it rains for 48 hours without a break. In some parts of the city, the roads flood (水淹), and anything with an engine(发动机) is useless. But the rickshaw drivers never stop working, even with water all around them.

    But not everyone thinks rickshaws are a good thing. The local government want to ban rickshaws. They believe it is wrong for one man to pull another person when there is modern transport in the city. However, there is a problemwith this plan. Many of the rickshaw drivers come from the countryside. The only job they can find in Kolkata is pulling a rickshaw. If the city bans rickshaws, these men won't have a job. So for the moment, the people of Kolkata still go by rickshaw.

1.What is the main idea of Paragraph 1?

A. The rickshaw drivers carry things for local people in Kolkata.

B. Parents need rickshaws for taking children to school in Kolkata.

C. Rickshaws can find a way through the bad traffic in Kolkata.

D. Rickshaws are very useful for the people's daily life in Kolkata.

2.Which type of transport may you take when the roads flood in Kolkata?

A. A bus.       B. A taxi.      C. A car.      D. A rickshaw.

3.What does the underlined word "ban" mean?

A. make       B. increase     C. forbid      D. collect

4.What can we learn from the passage?

A. The rickshaws in Kolkata have loud horns.

B. The rickshaw is still a part of public transport in Kolkata.

C. The local government offer many other jobs to the rickshaw driven.

D. The people in Kolkata are supposed to take rickshaws instead of cars.

 

When I crossed a small road on my first day in Kolkata, I was surprised because I heard a bell-not a horn (喇叭),  It was a tiny man pulling a rickshaw, He stopped and picked up two children from the front door of their house and pulled them to school. For many people, the rickshaw in Kolkata has many advantages. When the traffic is bad, rickshaws find a way through the traffic. If your miss your bus and there aren't any taxis, you can always find a rickshaw in Kolkata. Rickshaws are from your house to the market and waits for you. Then he loads (装载)all your things, drops you off outside your home and helps you unload, No other type of public transport offers this kind of service.

From June to September, Kolkata gets heavy rain. Sometimes it rains for 48 hours without a break. In some parts of the city, the roads flood (水淹), and anything with an engine(发动机) is useless, But the rickshaw drivers never stop working, even with water all around them.

But not everyone thinks rickshaws are a good thing. The local government want to ban rickshaws. They believe it is wrong for one man to pull another person when there is modern transport in the city. However, there is a problem with this plan. Many of the rickshaw drivers come from the countryside. The only job they can find in Kolkata is pulling a rickshaw, If the city bans rickshaws, these men won't have a job. So for the moment, the people of Kolkata still go by rickshaw.

1.What is the main idea of Paragraph 1?

A．The rickshaw drivers carry things for local people in Kolkata.

B．Parents need rickshaws for taking children to school in Kolkata.

C．Rickshaws can find a way through the bad traffic in Kolkata.

D．Rickshaws are very useful for the people's daily life in Kolkata.

2.Which type of transport may you take when the roads flood in Kolkata?

A．A bus.            B．A taxi.            C．A car.             D．A rickshaw.

3.What does the underlined word "ban" mean?

A．make             B．increase          C．forbid            D．collect

4.What can we learn from the passage?

A．The rickshaws in Kolkata have loud horns.

B．The rickshaw is still a part of public transport in Kolkata.

C．The local government offer many other jobs to the rickshaw driven.

D．The people in Kolkata are supposed to take rickshaws instead of cars.