Snack time is a part of the day for children of all ages. But new research suggests that kids snacking in big groups could be at risk for obesity.

Scientists from American University looked at the eating behavior of 54 kids between the ages of 2 and 6. At snack time, the scientist watched the amount of food each child ate while they were in groups of either three or nine. According to the study, the more children there are in a group, the more likely they are to eat more. Those in the larger group ate nearly 30 percent more than those in the smaller group, and they actually ate faster.

Since this is the first such study in children, scientists are quick to point out the importance of encouraging healthy habits in kids as early as possible.

“If you know kids eat more in large groups, it seems perfect to use this information to keep snack groups small or use small tables,” says Dr. Jana Klauer, an expert in New York.

Smaller groups would allow for a quiet and more relaxing environment-a perfect chance to teach children about food, manners and how to know when they feel full. “This would have an effect on kids' eating,” adds Klauer. “They would slow down and eat less.”

1.How many times have the scientists done such study according to the passage?

A．Once

B．Twice

C．Three times

D．Many times

2.The underlined word means”      ”in Chinese.

A．健康

B．肥胖

C．瘦弱

D．服从

3.Why do children in smaller groups lose weight?

A．Because children in smaller groups eat faster.

B．Because children in smaller groups don't like eating.

C．Because children in smaller groups don't know about food.

D．Because children in smaller groups eat slowly and eat less.

4.The best title of the passage is “         ”

A．Snack Time	B．Different Groups
C．Eating More	D．Food for Kids

 

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

 

Long long ago, an old scientist made a few tests on different animals to find out which was the cleverest of all the animals.

   In one test the old scientist put a monkey in a room. In the room there were many boxes. Some boxes were inside other boxes. The smallest box had some food in it. The scientist wanted to watch the monkey and to find out how long it would take the monkey to find the food. The scientist left the room. He waited for a few minutes outside the door. Then he put his eye to the keyhole(钥匙孔). What did he see? To his surprise, he found himself looking into the eye of the monkey. The monkey was on the other side of the door and looked at the scientist through the keyhole.  

1.The scientist wanted to know ____.

   A. if the monkey came into the small box          B. if the monkey would sleep

   C. which animal was cleverer than other animals   D. if some boxes were inside other boxes

2.After the scientist left the room, the monkey _______.

A. looked at the scientist through the keyhole          B. began to look for food   

C. came into the boxes one after another               D. began to eat the food 

3.To the scientist's surprise, _____.

A. the monkey went out of the room  

B. the monkey looked at the scientist through the window

C. began to look for food 

D. put its eyes to the keyhole.

 

Do you know that animals have love for each other and their children just like us humans? Let me tell you some moving stories of great animal parents.
Several years ago a heavy rain hit a town and made the river go up. When the rain stopped, people found that a dog swam to an island in the river twice a day for two weeks. Why did she do so? Her four children were there. The mother swam there every day to feed her babies. This true story moved many people.
Another story is about chimpanzees(猩猩). A scientist named Jane Goodall spent 4 years living with chimpanzees in Africa. She found that chimpanzees also cared for those that were hurt or got lost. “It is not only humans who have duties, animals also do,” she said.
Two birds in Chengdu also showed their parental(父母的) love. Their baby was hurt and fell on the street in the center of the city. Cars were driving past but the brave parents rushed down to the road and took the little bird away with their claws(爪子).
【小题1】 After the heavy rain, the mother dog swam to the island ________.
A. to look for food                 B. to feed her babies
C. to move some people              D. to carry things to her owner
【小题2】 The scientist found chimpanzees ________.

A．cared for the hurt or lost ones	B．often left for a far place
C．always stayed in the same place	D．didn’t care about each other

【小题3】The two birds rushed down and took the little one away because ________.

A．they didn’t like their baby	B．they were not kind enough
C．they wanted to teach their baby	D．they wanted to save their baby

【小题4】 From the passage we know ________.

A．dogs like to swim across the river in a heavy rain.

B．mother birds don’t want to save their children

C．animal parents love their children a lot

D．all animals want to move people very much

阅读下列短文,从所给的四个选项中选出最佳答案.
A young man once asked Albert Einstein, the great scientist,  66  the secret of success（成功） is. The scientist told him that the secret of success is 67  work. A few days later the young man asked him the same question again. Einstein was very  68 . He did not say  69 , but wrote  70  words on a piece of paper and handed it  71  the young man. The young man looked at the piece of paper.  72  it was written: A=X+Y+Z.
“What does this mean?” asked the young man.
“A means success,” explained the old scientist. “X stands for（代表） hard work, Y stands for good methods（方法）, and Z…, Z means stopping  73  and getting down to work.”

【小题1】

A．how B．what C．which D．why

【小题2】

A．hard B．easy C．good D．bad

【小题3】

A．pleased B．happy C．angry D．sorry

【小题4】

A．anything B．nothing C．something D．everything

【小题5】

A．a little B．little C．a few D．few

【小题6】

A．for B．to C．of D．with

【小题7】

A．Over B．On C．In D．At

【小题8】

A．talk B．to talk C．talked D．talking