阅读短文，从每题所给的ABC三个选项中选出最佳答案回答问题或完成句子。
When the traffic lights turn red, we will stop driving a car or crossing a street. Why is red used for traffic lights instead of other colors?
As we know, scattering (散射) happens when light goes through the air. For the same media(媒质), if the wavelength is long, the scattering will be short. If the wavelength is short, then the scattering will be long.
Of all lights 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 sec the lights. It helps drivers stow down or stop in lime. 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 lights help drivers stop in time and help prevent accidents.
1.When the traffic lights turn ______, we will stop driving a car.
A. red B green C. yellow
2.According to the passage, the scattering of the red light is the _______.
A. longest b. weakest C. 
farthest
3.The underlined word "wavelength" means________ in Chinese.
A.波浪 B.光波 C.波长
4.What can the red light help drivers do?
A. It can
help drivers in farther areas see the lights.
b. It can help drivers slow down or stop in time.
C. A and b
5.Which of the following is the best title?
A. Why do accidents happen
b. How does the red light travel
C. Why do we use red traffic lights
阅读短文，根据短文内容判断所给句子正(T)误(F)。
David got a job in a police station after he left school. He worked there for 
42 years and he’ll retire this year. He worked hard in the past 42 years. But he was not a lucky man. He failed to catch a thief. He was often sorry for it.
Last weekend, while David's wife was cooking she found there was no salt at home. So she asked her husband to buy some. In the shop, David saw a young man taking away a wallet from a woman's bag. He walked to him quietly, but the young man noticed David and ran away at once. David ran after him. At last the thief ran into a blind alley(死胡同) and David caught him.
“Please give me a chance, sir.” said the thief
“Who can give one to me?” said David, “I’ll soon retire and I catch a thief for the first time!”
1.David worked hard in the past 42 years.
2.David was a lucky man, and he often caught thieves.
3.Last weekend his wife asked him to buy some sugar.
4.A young man was stealing a woman's wallet in
a shop
5.The young man was the first thief that David caught.
根据所提供的句子意思，用所给单词的正确形式填空，使句子意思完整。并在答题卡上将答案填写在对应题号的横线上。
1.The old man lives on the _______ (five) floor.
2.What about ________(climb) the mountains this weekend?
3.She often ________ (do) her lessons in the afternoon.
4.Please give us some ________ (advice) on what to do next.
5.I can learn English by ________(my).
6.Yao Ming is famous as a basketball ________(play).
7.The little boy is sleeping now. Please be _______ (quietly).
8.I think this dictionary is _______ (help) for your study.
9.My cousin _______ (use) to eat junk food, but now he doesn't.
10.Of the three apples, this one is the ________(big).
Long ago there was a boy who was hungry for success. For him winning was .One day the boy was to run in a race in his village. Many people got together to Among the crowd was a wise old man.
The race began. All the runners ran very fast, but the boy at the last minute. The crowd cheered and waved at the boy. The wise man said nothing. The little boy felt and important.
“Another race, another race!” cried the little boy. The wise old man came over and presented ( 交给 ) the little boy with two new runners, an old woman and a blind man. “This is no race!” the little boy shouted.
“Race!” ordered the wise man. The boy won again. The crowd, , was silent this time.
“ don’t the people cheer for my success?” he asked the wise old man.
“Race again!” replied the wise man, “But this time, finish .” The little boy thought a little, and then took the hands of the blind man and the old woman. The race began and the little boy walked to the finishing line. The crowed . The wise man smiled.
“Who is the crowd cheering for?” asked the little boy. The wise old man, putting his hands on the boy’s shoulders, replied softly, “Little boy, for this race you have won than in any race you have ever run before, and for this race the crowd cheer not for any winner!”
1.A. something B. nothing C. anything D. everything
2.A. join B. runC. watchD. hear
3.A. failed B. beatC. wonD. lost
4.A. angryB. sad C. proudD. surprised
5.A. therefore B. howeverC. rather D. although
6.A. What B. HowC. WhenD. Why
7.A. well B. togetherC. away D. off
8.A. easilyB. quicklyC. slowlyD. hardly
9.A. shouted B. cheeredC. talkedD. cared
10.A. even lessB. much C. much more D. Little
—Must I get there on time?
一No, you .
A. can't B. mustn't C. needn't
Please tell him about it if he this afternoon.
A. comes B. come C. will come
