If we are driving a car or crossing a street, we will stop when the traffic lights turn red. Why do we use red rather than other colors?
As we know, scattering (散射) happens when light goes through the air. For the same media, if the wavelength (波长) is long, the scattering will be short. If the wavelength is short, then the scattering will be long.
Of all light we can see red has the longest wavelength, so the scattering is the weakest. That means the red light travels far. In fact, it travels farther on rainy days.
Using the red light can help drivers in farther areas see the lights. It helps drivers slow down or stop in time. If drivers don’t see the red light until they are close, they may not be able to stop the car in time. An accident may happen. Red can also excite people. We can act more quickly when we see the color red.
In a word, red light helps drivers stop in time and help prevent accidents.
1.______ has the longest wavelength of all light we can see.
A. Red B. Green C. Yellow D. Black
2.Red light travels farther on ______ days.
A. windy B. sunny C. rainy D. cloudy
3.Red can make people act more quickly because ____________.
A. red can make people happier B. the scattering of red is very short
C. the scattering of red is very long D. red can make people more excited
4.The underlined word “prevent” means ______ in Chinese.
A.逃避 B. 防止 C. 处理 D. 检查
5.The passage mainly tells us ____________.
A. why accidents happen B. how the red light travels
C. why we use red traffic lights D. how to stop in time at traffic lights
One day I happened to meet an Englishman in the street and soon we began to talk. As I was talking about how I was studying English, the foreigner seemed to be very surprised, gently shaking his head and saying “You don’t say!” I was puzzled, and I thought , “Perhaps this is not a right thing to talk about.” So I said to him, “Well, shall we talk about the Great Wall? Have you ever been there?”
“Certainly! Everyone back home will laugh at me if I leave here without seeing it. The Great Wall is wonderful!” “Yes, it is one of the wonders in the world. And people of many countries have come to visit it.” As I went on telling him more about it, he stopped me again, “You don’t say!”
I couldn’t help asking, “Why do you ask me not to talk about it? ”
“Well, I didn’t ask you to do so,” he answered, greatly surprised.
“Did you say ‘You don’t say!’?” I asked again.
Hearing this, the foreigner laughed loudly. He began to explain, “‘You don’t say!’ means ‘Really’. Perhaps you know little about English idioms(惯用语).”
Wow! How foolish I was! Since then I have been careful with English idioms.
1.The writer was puzzled because .
A. the foreigner has some difficulty in understanding him.
B. the writer himself didn’t understand the meaning of “You don’t say!”
C. the foreigner was not polite.
D. the writer was very clever
2.What made the foreigner laugh?
A. The English idioms B. The writer’s talking about the Great Wall
C. The writer’s explanation D. The writer’s question
3.The story probably happened in .
A. China B. America C. England D. Canada
4.The writer was puzzled in the passage.
A. once B. twice C. three times D. four times
5.The English idiom “You don’t say!” means “ ”
A. Thank you B.OK C. Really D. Sorry
A young man was about to finish school. For a long time he had 36 to get a beautiful sports car. He knew his father could well 37 it, so he told him that a sports car was all he wanted.
Then on the morning of his graduation（毕业）,he was called to his father's room. His father told him how 38 he was to have such a fine son, and told him how 39 he loved him. He handed his son a beautiful gift box. 40 , the young man opened the box and found a lovely Bible（圣经）with his name on it. Angrily, he raised his 41 to his father and said, "With all your money you give me a Bible? " He then 42 out of the house, leaving the Bible.
Many years passed and the young man was very 43 in business, and had a beautiful home and a wonderful family. 44 that his father was very old, he thought perhaps he should go to see him. He had not seen him 45 that graduation day. Before he could go, he received a 46 telling him that his father had died. He had to go home immediately and take 47 of the things that his father left him.
When he began to search through his father's important papers, he saw the still new Bible, 48 as he had left it years ago. He opened the Bible and began to 49 the pages. As he was reading, a car key with a tag（标牌）dropped from the back of the Bible. On the tag was the 50 of his graduation, and the words "PAID IN FULL". Sadness and regret（悔恨）filled his heart.
1. A．hoped B．believed C．enjoyed D．felt
2.A．afford B．spend C．cost D．pay
3. A．excited B．proud C．angry D．afraid
4.A．far B．much C．long D．often
5.A．Interested B．Tired C．Surprised D．Relaxed
6. A．hand B．head C．voice D．sound
7.A．looked B．moved C．walked D．ran
8.A．careful B．helpful C．wonderful D．successful
9.A．Wanting B．Suggesting C．Noticing D．Realizing
10. A．on B．since C．after D．from
11.A．bag B．ticket C．phone D．book
12. A．care B．part C．notes D．time
13.A．just B．only C．always D．already
14. A．use B．open C．turn D．close
15.A．place B．date C．test D．name
—I usually have milk and bread for breakfast.
—_____.
A. So do I B. So have I C. So I do D. So I have
We were greatly ______ by the program performed by Xiao Shengyang on CCTV.
A. impressing B. impressed C. memorizing D. realized
—How do you study a test?
—I study working a group.
A. for; in; with B. for; by; at C. of; in; by D. for; by; with
