Everybody has a brain，but not many people know how the brain works.Some people believe that the brain is like the hard disk of a computer.We use it to store files 一 pictures，language （words，texts，sounds） and so on.Others compare the brain to a huge cupboard with lots of shelves and boxes in it.We put information into these boxes and hope to find it again later.
The brain is not a computer disk，and it isn't a cupboard.Look at the picture here.It looks a hit like weeds（杂草）in a garden，doesn't it？The picture actually shows a child's neocortex— a part of the brain that controls sight and hearing.You can guess what happens 一 more "weeds" grow as the child gets older.Scientists call these neuronal（神经元的）networks.The networks grow around our neurons.What makes them grow？"Learning!Learning is brain change， "says Professor James Zull from Case Western University in Cleveland，Ohio，USA. "Without learning，nothing changes in the brain.For every new word you learn in your English lesson，every problem you solve in maths，every new song you learn to sing，a neuronal network grows in your brain and the brain changes."
The more neuronal networks we grow，the better we can think and the better we remember.You may wonder if there is anything you can do to make the networks in your brain grow better.Professor Zull says yes，there is.He says that brain change is strongest when a） you are interested in and like what you are learning，b） you are in control of what you learn and c） you get challenging tasks that make you think hard.Understanding a challenging task makes you feel good and develops your brain.
（1）What's the main idea of the first paragraph？
A.The brain — a fantastic computer.
B.What people believe about the brain.
C.How to make your brain stronger.
D.Our brain 一 a growing system.
（2）What can we learn from the passage？
A.Learning makes our neuronal networks grow.
B.Seeing a challenging task develops our brain.
C We remember better when things are easy.
D.There's nothing we can do to make us smarter.
（3）What's the best title for the passage？
A.Interest is the best teacher.
B.Meeting life's challenges.
C.Never too late to learn.
D.Learning is brain change.
Recent research from the Pew Internet Project suggests that 90% of Americans aged from 12 to 17 use the Internet, and 51% of those teens use social networks. However, there are many possible problems with social networking sites and the teenagers who use them. 
Apart from the social advantages, social networking sites can be used to record school research, develop artistic talents and experiment with other forms of subject creation. They provide a way to communicate with others who share the same interests and to get helpful advice on ongoing projects.
Along with these advantages come some dangers. For example, most social networking sites are open to all, especially MySpace, which is the most popular social network among teens in America. It means that they could be put in unpleasant and frightening situations.
A greater danger is that teens may become objects of the people with secret purposes. The secrecy of some social networking sites makes it easy for dangerous people to find young teens and invite them into dangerous conversations. It’s easy for them to pretend as teens and draw children into dangerous real-world communication as well. Then further hurt might be on its way.
Another danger is identity stealing, which can happen when teens share too much information about their names, dates of birth and locations.
Therefore, it’s very important to make sure teens are safe when they use social networks.
Many of the same rules that work for online chat work for these sites:
※Don’t use your real name.
※ Don’t give out personal information to people you don’t know. A last name and a town
are enough for a bad guy to find where you are.
※ Don’t believe that people are who they say to be.
※ Immediately end any communication that makes you uncomfortable and report it to a
parent.
Only if you are sure of your safety, can you enjoy the fun brought by social networking. Besides, trying to deal with all problems on your own can lead to terrible results. Remember, asking your parents or school officials for help doesn’t mean you are unable to do anything but wiser than many others. How many dangers of using social networks are mentioned in the passage?
| A．2. | B．3. | C．4. | D．5. |
The writer takes MySpace as an example to show that ________.
| A．students could be put into unreal situations on the Internet |
| B．teenagers are facing unknown dangers on the social networks |
| C．Internet provides more social websites to American teenagers |
| D．social networks are very popular among teenagers in America |
We can infer from the passage that ________.
| A．the dangers are similar when chatting online and surfing social networks |
| B．more than half American teenagers aged from 12 to 17 use social networks |
| C．teens who ask for help are wiser when meeting problems on social networks |
| D．there are more disadvantages than advantages for teens to use social networks |
Cooking and Learning
In this E-book package, we have four e-books. 
Fun with Food
This fun e-book is filled with 
exercises --- photo tests,
word exams, riddle games,
coloring pages and exercises
on learning more about food.
 |
 |
Kids can ________ by reading Fun with Food.
| A．do science experiments | B．get cooking experience |
| C．cook well in the kitchen | D．play some riddle games |
________ has over sixty pages.
| A．Fun with Food | B． Kids Cooking Lessons E-Book |
| C．Food Facts E-Book | D．Kids Food Science Experiments |
Kids Cooking Lessons E-Book is popular because ________.
| A．there is a unit for each age group | B．there are a lot of photo tests in it |
| C．kids can learn more about science | D．each part is very easy to print off |
Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) a world famous scientist!
Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.
"We’ve learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."
British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.
But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It’s hard to get a clear result.
Will there be a better indicator than litmus paper? The three kids decided to try and find out!
How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (茎) to get the pigments (色素) from them.
The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best colour change. They decided it was the litmus paper!
"It’s our first scientific journey, Huang said, "But it makes me want to try harder." Whom did the three kids want to challenge?
| A．Their chemistry teacher. | B．Their headmaster. |
| C．Robert Boyle | D．Thomas Edison |
From the text, a red cabbage is a kind of ____.
| A．plant | B．animal | C．paper | D．liquid |
What is widely used as the acid-base indicator now?
| A．red cabbage | B．litmus paper |
| C．any plant | D．any flower |
The story mainly tells us ____.
| A．how to make litmus paper | B．about the three kids’ spirit |
| C．scientists were wrong | D．the kids are heroes |
Frank bought a new doorbell, but nobody seemed to notice it. When his friends came, they knocked heavily at the door. Frank was not happy about it.
One day a friend came to see Frank. He knocked at the door loudly. Frank came to the door, but didn’t open it. He shouted at the visitor from inside. “ I can’t hear you! Please ring the doorbell!”What did Frank buy?
_____________________________________________________________Why wasn’t Frank happy?
_____________________________________________________________Who came to see Frank one day?
_____________________________________________________________Why didn’t Frank open the door?
_____________________________________________________________Did Frank hear the knock?
_____________________________________________________________
Name Introductions
Daniel Radcliff Born in London, England in 1989
An actor
Played the part of Harry Potter
Celina Dixon Born in Montreal, Canada in 1968
A singing star
In 1997, sang My Heart Will Go On for the film Titanic
Thomas Edison Born in 1847, Kentucky, the USA
Made over 1,000 inventions
Died in 1931
Bill Gates Born in 1955 in the USA
Wrote Business@ the Speed of Thought
Owns Microsoft Company
Mark Twain Born in 1835 in the USA
A writer
Wrote Tom Sawyer
Died in 1910 Who is the youngest of the people?
| A．Daniel Radcliff. | B．Celina Dixon. |
| C．Bill Gates. | D．Mark Twain |
________ people of the five people come from the USA.
A. Five B. Two C. Three D. FourMy Heart Will Go On is the name of a ________.
| A．film | B．book | C．story | D．song |
Thomas Edison died at the age of ________.
| A．81 | B．82 | C．84 | D．85 |
Who wrote Tom Sawyer?
| A．Thomas Edison. | B．Bill Gates. |
| C．Celina Dixon. | D．Mark Twain. |