The flying fox is not a fox at all. It is an extra large bat that has got a fox’s head, and that feeds on fruit. Like all bats, flying foxes hang themselves by their toes (趾) when at rest, and travel in great crowds when out flying. A group will live in one place for years. Sometimes several hundreds of them occupy a single tree. As they return to the tree towards sunrise, they quarrel among themselves and fight for the best places until long after daylight.

Flying foxes have babies once a year, giving birth to only one at a time. At first the mother has to carry the baby on her chest wherever she goes. Later she leaves it hanging up, and brings back food for it to eat. Sometimes a baby bat falls to the ground. Then the older ones fly down and try to pick it up. If they fail to do so, it will die. Often hundreds of baby bats can be found lying on the ground at the foot of the tree.

1.The passage tells us that there is no difference between the flying fox and the ordinary bat in ______.

   A. their size   B. their appearance

C. the kind of food they eat        D. the way they rest

2.Flying foxes ______.

   A. double their number every year

B. fight and kill a lot of themselves

   C. move from place to place very often

D. lose a lot of their young

3.At daybreak every day flying foxes begin to ______.

   A. fly out toward the sun

B. look for a new resting place

   C. come back to their home

D. go out and look for food

4.Flying foxes have fights ______.

   A. to occupy the best resting places

B. only when it is dark

   C. to protect their homes from outsiders

D. when there is not enough food

5.How do flying foxes care for their young?

   A. They only care for their own babies. 

B. They share the feeding of their young.

   C. They help when a baby bat is in danger.

D. They often leave home and forget their young.

 

Motherhood may make women smarter and may help prevent dementia(痴呆) in old age by bathing the brain in protective hormones(荷尔蒙) , U.S. reseachers reported on Thursday.

Tests on rats show that those who raise two or more litters of pups do considerably better in tests of memory and skills than rats who have no babies, and their brains show changes that suggest they may be protected against diseases such as Alzheimer’s(早老痴呆症). University of Richmond psychology professor Craig Kinsley believes his findings will translate into humans.

“Our research shows that the hormones of pregnancy(怀孕) are protecting the brain, including estrogen(雌激素), which we know has many neuroprotective (保护神经的) effects,” Kinsley said.  

“It’s rat data but humans are mammals just like these animals are mammals,” he added in a telephone interview. “They go through pregnancy and hormonal changes.”

Kinsley said he hoped public health officials and researchers will look to see if having had children protects a woman from Alzheimer’s and other forms of age-related brain decline.

“When people think about pregnancy, they think about what happens to babies and the mother from the neck down,” said Kinsley, who presented his findings to the annual meeting of the Society of Neuroscience in Orlando, Florida.

“They do not realize that hormones are washing on the brain. If you look at female animals who have never gone through pregnancy, they act differently toward young. But if she goes through pregnancy, she will sacrifice her life for her infant—that is a great change in her behavior that showed in genetic alterations(改变) to the brain.”

How do scientists know “Motherhood may make women smarter”?

A. Some researchers have told them.

B. Many women say so.

C. They know it by experimenting on rats.

D. They know it through their own experience.

What does the phrase “litters of pups” mean in the second paragraph?

A. Baby rats.         B. Animals.    C. Old rats.            D. Grown-up rats.

What can protect the brain of a woman according to the passage?

A. Estrogen.                            B. The hormones of pregnancy.    

C. More exercise.                     D. Taking care of children.

“It’s rat data but humans are mammals just like these animals are mammals.” What does the sentence suggest?

A. The experiments on the rats have nothing to do with humans.

B. The experiments on the rats are very important for animals.

C. The experiments on the rats are much the same on humans.

D. The experiments on the rats are much the same on other animals.

Which title is the best for this passage?

A. Do You Want to Be Smarter?

B. Motherhood Makes Women Smarter

C. Mysterious Hormones  

D. An Important Study

Connie Lau hates smoking. “It smells awful, and it’s so bad for you. It breaks my heart to see my friends smoking. I try to get them to give up smoking.” She says.

So why does Connie walk into convenience stores and try to buy cigarettes? She is testing to see if stores will sell cigarettes to a kid who is younger than 18. “You have to be 18 to purchase cigarettes, and I’m 16, so if they sell to me, they’re breaking the law,” Connie says.

Connie isn’t a vigilante (治安队员); She works with local police in her town of Castro Valley, California. Officers drive her to stores, and she goes in alone to try to buy cigarettes. If the person behind the counter sells her a pack, an officer comes in and writes the business a ticket for breaking the law.

Most stores obey the law and don’t sell her cigarettes. The law requires that customers show ID if store employees ask them to. “When they ask your age, you can’t lie,” Connie says. “Most stores don’t sell to me. In a year, we’ve visited almost 150 stores and had only 15 sales.”

Working undercover can be scary, even with police nearby. Connie said one cashier refused to sell her cigarettes and then got angry when he found out her age. He threatened to call the authorities. “To calm him down, the police went in to explain that I was undercover,” she says.

Most teens wouldn’t think of going undercover for the police. What’s Connie’s motivation (动机)? For starters, she can’t stand smoking. But she also believes it’s important for young people like her to try to make a real impact in their communities. In her view, teens can do more than get good grades in school, do chores at home, and do well in out-of-class activities.

Every time she stops the sale of cigarettes to children, she’s helping to uphold the law. “A single teenager can make a big difference,” Connie says. “For the most part, when stores get caught, they learn their lesson and don’t do it again.”

1.According to the law what age of person can the store be allowed to sell cigarettes to?

A．Under 18.         B．More than 18.      C．16.              D．More than 16.

2.Connie goes to convenience stores to ________.

A．discover whether stores can sell cigarettes to kids

B．see which stores can sell cigarettes to her friends

C．look for her friends

D．arrest the smokers

3.What would happen if an owner sells cigarettes to kids?

A．The owner would be arrested.             B．The owner would be fined.

C．The kids would be punished.               D．The kids would be removed from school.

4.One reason that Connie works undercover is that ________.

A．she wants more smokers to quit smoking

B．she wants to get good grades in school

C．she hopes to make a difference in the area

D．she hopes to be excellent in out-of-class activities

5.Which of the following might be the main idea of the text?

A．Smoking can be forbidden with the help of a girl.

B．A good way to stop a store from selling cigarettes to kids.

C．Connie Lau — a brave girl who goes undercover for the policeman.

D．Connie Lau goes undercover to stop stores from selling cigarettes to kids.

 

_____ she goes, there are crowds of people waiting to see her.

A. Wherever   B. however

C. Whichever D. Whoever

Motherhood may make women smarter and may help prevent dementia(痴呆) in old age by bathing the brain in protective hormones(荷尔蒙) , U.S. reseachers reported on Thursday.

Tests on rats show that those who raise two or more litters of pups do considerably better in tests of memory and skills than rats who have no babies, and their brains show changes that suggest they may be protected against diseases such as Alzheimer’s(早老痴呆症). University of Richmond psychology professor Craig Kinsley believes his findings will translate into humans.

“Our research shows that the hormones of pregnancy(怀孕) are protecting the brain, including estrogen(雌激素), which we know has many neuroprotective (保护神经的) effects,” Kinsley said.  

“It’s rat data but humans are mammals just like these animals are mammals,” he added in a telephone interview. “They go through pregnancy and hormonal changes.”

Kinsley said he hoped public health officials and researchers will look to see if having had children protects a woman from Alzheimer’s and other forms of age-related brain decline.

“When people think about pregnancy, they think about what happens to babies and the mother from the neck down,” said Kinsley, who presented his findings to the annual meeting of the Society of Neuroscience in Orlando, Florida.

“They do not realize that hormones are washing on the brain. If you look at female animals who have never gone through pregnancy, they act differently toward young. But if she goes through pregnancy, she will sacrifice her life for her infant—that is a great change in her behavior that showed in genetic alterations(改变) to the brain.”

How do scientists know “Motherhood may make women smarter”?

A. Some researchers have told them.

B. Many women say so.

C. They know it by experimenting on rats.

D. They know it through their own experience.

What does the phrase “litters of pups” mean in the second paragraph?

A. Baby rats.         B. Animals.    C. Old rats.            D. Grown-up rats.

What can protect the brain of a woman according to the passage?

A. Estrogen.                            B. The hormones of pregnancy.    

C. More exercise.                     D. Taking care of children.

“It’s rat data but humans are mammals just like these animals are mammals.” What does the sentence suggest?

A. The experiments on the rats have nothing to do with humans.

B. The experiments on the rats are very important for animals.

C. The experiments on the rats are much the same on humans.

D. The experiments on the rats are much the same on other animals.

Which title is the best for this passage?

A. Do You Want to Be Smarter?  B. Motherhood Makes Women Smarter

C. Mysterious Hormones       D. An Important Study