Thefollowingareintroductionsto-优题课

Have you wondered why different animals or pests have their particular colors? Colors in them seem to be used mainly to protect themselves.
Birds, especially seagulls are very fond of locusts, but birds can’t easily catch locusts because locusts change their colors together with the change of the color of crops. When crops are green, locusts look green. But when crops are ripe, locusts take on exactly the same brown color as crops have. Some other pests with different colors from plants are usually easily found and eaten by their enemies. So they have to hide themselves in terror for lives and appear only at night.
If you study the animal life in any part of the world, you will find the main use of coloring is to protect themselves, bears, wolves and other beasts move quietly through forests. They are usually invisible to the eyes of hunters, because they have the color much like the barks(树皮) of trees.
An even more strange act remains to be noticed. A kind of fish living in seas can send out a kind of very black liquid when it faces danger. While the liquid is over, its enemies cannot find it, and it quickly swims away. Thus, it has existed up to now though it is not powerful at all.
This passage mainly talks about ______.

A．the change of color in locusts

B．the protective coloration of animals and pests

C．how a certain sea fish protects itself

D．animals or pests can dye themselves different colors

Locusts are ______ but they aren’t easily wiped out(消灭)by their enemies because _______.

A．animals; they are powerful enough

B．beasts; they are dangerous to their enemies

C．pests; they take on the same colors as crops

D．birds; they fly very fast

What does the underlined word “invisible” in Paragraph 3 mean?

A．can’t be seen

B．can be seen

C．can’t move

D．can’t change

The laptop is a machine which can be a mobile office；it can be used to entertain us and people can play computer games on them. One machine can perform many tasks at the same time. As technology grows，the size of the new laptop machines is decreasing. Now laptops are lighter，have smaller screen sizes，and perform better. Smaller screen laptops，which are more convenient to take along with，have been specially designed for professionals. Huge display screen laptops are still used by graphic(绘画的)designers and those who like playing computer games.
Laptops are advanced machines，and they can be very expensive. When we spend much money on something，we should take good care of it. I know some people who buy a new laptop every year. The reason they do this is that the old one either is broken or has some problems which cannot be fixed. Common problems are the breaking of the screen，the breaking of joints of the laptop，display problems，and keyboard problems.
Different problems will always come up with machines，and they cannot be avoided(避免)．Old machines will always have to be replaced by new ones. However，if we are more careful and handle our laptops with care，they will last for a longer period of time，and they will perform better. This is not a hard thing to do，but it will greatly increase the life and performance of laptops.
According to the first paragraph，the laptop is a machine which________.

A．is being used by more and more people in the office

B．will take the place of desktops sooner or later

C．is specially designed for people who like playing computer games

D．can be used for both work and entertainment purposes

The underlined word in the first paragraph means “________”．

A．becoming smaller

B．becoming more important

C．becoming more popular

D．becoming better

We infer that graphic designers still use huge display screen laptops most probably because________.

A．huge display screen laptops are very cheap

B．small display screen laptops are not on sale yet

C．they can see their drawings more clearly

D．they also want to play computer games

What can we learn from the second paragraph?

A．That laptops can only be used for one year.

B．That laptops are not as good as desktops.

C．That the prices for laptops are too high.

D．That laptops may have problems which cannot be fixed.

Welcome to our school. You can do a lot of things here. Come and join us.

Timetable
Sunday8:30---11:30 Personal Inventions You can see many inventions by the students; you may also bring your own inventions.	Monday19:00---21:00 Space and Man Dr. Thomas West If you want to know more about the universe.
Wednesday 19:30---21:00 Modern Medicine Mrs. Lucy Green Would you like to know medical science?	Friday18:30---21:00 Computer Science Mr. Harry Morison from Harvard University Learn to use Windows XP.

You may have a chance to introduce your inventions on _________.

A．Sunday

B．Monday

C．Wednesday

D．Friday

The person who teaches Computer Science is from___________.

A．Canada

B．Australia

C．New Zealand

D．America

You may learn something about a disease called TB from __________.

A．Dr. West

B．Mr. Morison

C．Mrs. Green

D．Mr. Thomas

If you want to learn something about satellites, you can go to the class from______.

A．8:30 to 11:30 on Sunday

B．19:00 to 21:00 on Monday

C．19:30 to 21:00 on Wednesday

D．18:30 to 21:00 on Friday

When Ben Franklin was very only a boy, he always wanted to know about things. He was always asking his father and brothers “What?” and “How?” and “Why?”
They couldn’t always tell him what he wanted to know.
When they couldn’t tell him, Ben tried to find out for himself.
Many times Ben did find out things that no one knew before. The other boys would say, “That’s Ben Franklin! He’s always finding out something new! ”
Ben lived close to the water. He liked to go there to see the boats. He saw how the wind blew them across the water.
One day Ben said to himself, “Why can’t the wind help me float across the water? And I’m going to try.” Ben got his big kite. He took hold of the kite string and ran with it. The wind took the kite up into the air. Then Ben jumped into the water.
The wind blew the kite high into the air. Ben began to float across the water. Soon he was on the other side, and he had not worked at all.
One boy shouted, “Look at Ben floating across the water! His kite takes him to the other side without any work!”
“Yes”, said another. “He’s always finding new ways to do things.”
When he was only a child, Ben _____.

A．liked to fly a kite by himself

B．always asked easy questions

C．always liked to play with water

D．always liked to find out how things worked

His father and brothers _____.

A．couldn’t answer all his questions

B．could answer all his questions

C．tried hard to find out something new for him

D．were too busy to answer his questions

How did Ben Franklin float across the water?

A．The other boy took him across it.

B．The water carried him across it.

C．The flying kite took him across it.

D．A boat took him across it.

He found out many things that ____.

A．children didn’t know

B．his father and brothers knew

C．people didn’t know

D．most people knew

My bike was a three-speed English “racer”, purchased during my second year in college in November 1964 for $44. Most of the money was earned by myself in my spare time, but I had to get my mother to help me out a little. At that time, bikes were rare on a college campus. My reason for getting a bicycle was a little strange. A friend of mine convinced me to take a summer job selling door-to-door and suggested that I should use a bicycle to travel between houses. The job didn’t work out, but the idea was in my brain.
That fall, I borrowed another student’s bike and rode 45 miles on the first day, but his bike soon had a flat(瘪了的轮胎) which he didn’t like fixing. So I had to buy one. I immediately started using mine almost every day. Before getting the bike, I sometimes walked 28 miles to my parents’ house. Now the bike gave me a quicker method, but my first trip took four hours due to strong headwinds that had me fight for every foot. Once I made a trip of 100 miles in one day. I decided to use the bike to go camping in the Smokies. During the trip, I recognized the need for handlebars and more gears, so I bought a ten-speed after just one year though I loved this bike.
The first bike “hung around” for a couple of years, and then I gave it to my sister’s kids who let it become part of their lives.
What can we learn from the passage?

A．His mother gave him some money when he bought the first bike.

B．The first bike was a gift from his mother.

C．He bought the first bike for racing.

D．He wanted to buy a bike because all his classmates had one.

We can infer that besides studying at college the writer ____.

A．often helped his friend do business

B．also worked in a factory

C．had part-time jobs in his spare time

D．had to make money to pay for his tuition

The underlined phrase “the idea” in the first paragraph refers to “____”.

A．selling door-to-door

B．buying a bike of his own

C．borrowing a bike from others

D．earning money by working

According to the passage, we can learn that the first bike was ____ for him.

A．unnecessary	B．very useful
C．a lifelong tool	D．too troublesome

12:25 a．m．Tuesday	The Real Swiss Robinson Family Laura worried that her children have had their life too easy due to her husband’s career in big business, so she decides to take her teenagers to the Cook Islands to experience the simple life．They face storms and a lack of food, but Laura is happy as their local guide shows them the island’s wealth of rare fruits and foods．
11:00 a．m．Wednesday	Orangutan Diary A Team have come across an armed man who is holding two baby apes who were captures one of them, David, is sent to a medical emergency in the forest．Later a center director, Nielsen, finds a suitable place to set free more rescued animals．
7:50 p．m．Thursday	Lost Buildings of Britain Simon Thurley visits the ruins of Glastonbruy Abbey（修道院），which , before its destruction by Henry VIII, was famous for some of the most amazing stained-glass of its age．It also had a great deal of financial power, acting as the center of an influential business empire．Eventually, it was the king’s envy of the abbey’s wealth that changed the abbey’s fate．
10:35 p．m．Thursday	Nigella Express Nigella presents ideas for impromptu（即兴的）cooking, from new recipes and suggestions for taking advantage of the food you have to making quick, simple and impressive meals．