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.
1.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
2.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
3.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.
1.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
2.The underlined word in the first paragraph means “________”．
A．becoming smaller
B．becoming more important
C．becoming more popular
D．becoming better
3.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
4.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 |
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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. |
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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. |
1.You may have a chance to introduce your inventions on _________.
A. Sunday B. Monday C. Wednesday D. Friday
2.The person who teaches Computer Science is from___________.
A. Canada B. Australia C. New Zealand D. America
3.You may learn something about a disease called TB from __________.
A. Dr. West B. Mr. Morison C. Mrs. Green D. Mr. Thomas
4.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.”
1.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
2.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
3.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.
4.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
Since ancient times, people have known about its ability to reduce pain and high body temperature. More than 2000 years ago, the Greek doctor Hippocrates advised his patients to chew on the bark and leaves of the willow.
The tree contains a chemical called salicin（柳醇）. From salicin, researchers in the 1800s discovered how to make salicylic acid（酸）. And in 1897, a chemist named Felix Hoffmann at Friedrich Bayer and Company in Germany created acetyl salicylic acid. Later it became the active substance in a new medicine that Bayer called aspirin. The "a" came from acetyl. The "spir" came from the spirea plant, which also produces salicin. And the "in" Well, that is a common way to end medicine names.
In 1982, a British scientist shared the Nobel Prize in Medicine in part for discovering how aspirin works. Sir John Vane found that aspirin blocks the body from making natural substances called prostaglandins（前列腺素）.Prostaglandins have several effects on the body. Some cause pain and the expansion, or swelling（ 肿瘤; 膨胀）, of damaged tissue. Others protect the lining of the stomach and small intestine. Prostaglandins also make the heart, kidneys and blood vessels （血管）work well. But there is a problem. Aspirin works against all prostaglandins, good and bad. Scientists learned how aspirin interferes with an enzyme（酶）. One form of this enzyme makes the prostaglandin that causes pain and swelling. Another form of the enzyme creates a protective effect. So aspirin can reduce pain and swelling in damaged tissues. But it can also harm the inside of the stomach and small intestine（肠）.
1.What sickness can the medicine from the willow deal with according to the passage?
A. Cold B. Toothache C. Cancer D. Skin disease
2.What can we know about Prostaglandin according to the passage?
A. It results from pain.
B. It prevents the lining of the stomach and small intestine.
C. It causes blood vessels to work wrongly.
D. It is sometimes good but sometimes bad.
3.What can we know about aspirin according to the passage?
A. Aspirin can treat almost diseases.
B. Aspirin can create the protective enzyme.
C. Aspirin can harm the inside of the stomach and small intestine.
D. Aspirin can protect the inside of the stomach and small intestine.
It’s not easy growing up. Growing up can be a real “pain” for some of us. Sometimes we feel trapped, sometimes we feel sad, sometimes we are fearful, and sometimes we just don’t understand why we can’t stay young forever. But we should take a look back on all the hardships in life with a positive attitude and learn from them. We must overcome every obstacle one small step at a time. We should realize that all of our growing pains actually turn into growing gains!
Throughout our lives we are going to face many challenges and pains, but we should never let these obstacles keep us from following our dreams. We must overcome every obstacle one small step at a time.
As a young girl, my parents forced me to do so many things that I didn’t like. They made me learn to play the violin and then the piano. At that time I hated music and I also hated them. But looking back now, I am so glad that my parents encouraged me to take music lessons. Music has enriched(丰富) my life in so many ways. I now realize that my parents and teachers wanted me to have a better life than they did themselves.
We are all going to experience growing pains, but they are just part of our life. They might seem so huge at the time, but we must be strong. Think about how we would feel if we had no challenges and lived a life like that. Life would be really boring and meaningless. The future is ours! A little hard work and sweat never hurt anyone! If we realize that these pains are just small bumps(碰撞) on our road to success, we will realize that our growing pains are actually growing gains!
1.The underlined word “obstacles” (in Paragraph 2) roughly means things that ______.
A. are related to your studies
B. you easily achieve
C. make you happy
D. make it difficult for you to do something
2.How does the author now feel when remembering what her parents did for her in the past?
A. She is fearful B. She is grateful
C. She feels trapped D. She feels hateful
3.We can know from the last paragraph that _____________.
A. life without challenges is dull
B. life needs no pains but sunshine and happiness
C. we should give up faced with challenges as the future is ours
D. we shouldn’t easily pay a little hard work in growing up
4.The purpose of the passage is to tell readers____________.
A. life is full of hardships
B. growing pains can turn into growing gains in a positive way
C. everyone is painful in growing up
D. everyone should do what they don’t like when young
