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 islong, 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. When the traffic lights turn ______, we will stop driving a car.
A. red B green C. yellowAccording to the passage, the scattering of the red light is the _______.
A. longest b. weakest C. farthest The underlined word "wavelength" means________ in Chinese.
A.波浪 B.光波 C.波长 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 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
Whenever the sun dropped and the blue sky came up, my father and I used to climb the mountain near my house. Walking together, my father and I used to have a lot of conversations through which I learned lessons from his experiences. He always told me, “You should have goals like climbing the mountain.” Without the mountain-climbing that we both enjoyed, we couldn’t have enough time to spend together because my father was very busy. I really got a lot from the mountain-climbing. It gave me time to talk with my father and to be in deep thought as well as develop my patience.
Once we climbed a very high mountain. It was so challenging for me because I was only ten years old. During the first few hours of climbing, I enjoyed the flowers and trees, and the birds’ singing. But as time passed, I got a pain in both of my legs. I wanted to stop climbing, but my father said to me, “You can always see a beautiful sky at the top of the mountain, but you can’t see it before you reach the top. Only there can you see all of the nice things, which is just like your life.”
At that time, I was too young to understand his words. But later after that, I got to know the meaning of hope in life. I found myself standing at the top of the mountain, and the sky was as clear as crystal. The writer tells us that mountain-climbing was ______ for his father and him.
A. hard B. enjoyable C. painful The underlined word “crystal” in the passage means _______.
A. 岩石 B. 火焰 C. 水晶 Which of the following is the closest meaning to the father’s words in the second paragraph?
A. You will get all you need at the top of the mountain.
B. Never give up half-way.
C.You can find life is full of nice things.We can infer(推断) from the last paragraph that ______.
A. the writer was very successful in his life
B. the writer reached the top of the mountain
C. though the writer was young, he could understand his fatherWhich one is the best title for the passage?
A. Reaching the Top of the Mountain.
B. Standing at the Top of the Mountain.
C. Conversations between Father and Son.
注：courtesy礼貌，audience观众How many days will the show be on?
A. For 10 days. B. For 12 days. C. For 15 days. How long does each show last?
A. Half an hour. B. One hour. C. One hour and a half'. If a family of four go to the theatre in the evening，they have to pay at least dollars for the tickets
A. 85 B. 100 C. 120 are not allowed to enter the theatre
A. Latecomers B. Kids below three years old C. School students 70 What information CANNOT be found in the advertisement?
A. The name of the show. B. The name of the director. C. The telephone number.
阅读短文，按要求完成短文后的各项任务。
Because earthquakes happen without warning, it’s important to take steps now to prepare. Because you don’t know where you will be when an earthquake happens, prepare some supplies for your home, workplace and car.
1. Water
A person needs 1or 2 gallons of water daily just for drinking. (1)So store
1 gallon of water per person every day and be prepared for a 72-hour period. It is suggested that you buy bottled water. Keep bottled water in its original container and (2) do not open it until you need to use it. Also, do check the “use by” date.
2. Food
It’s always a practical idea to keep a supply of non-perishable (不易腐烂的) food on hand. Have an enough supply of canned food, powered milk, dried fruits, non-salted nuts and canned juices for at least 72 hours.
3. Flash light (手电筒) and spare batteries
Keep a flashlight beside your bed, at your place of work, and in your car. Do not use matches or candles after an earthquake until you are sure there are no gas leaks. Prepare a battery-powered radio and spare batteries. Most telephones will be out of order, so radios will be your best source of information.
4. Clothes
If you live in a cold place, you must think about warmth. You might not have heat after an earthquake. Think about your clothing and bedding supplies.在（1）句的空白处分别填入一个适当的词使句意完整、上下文通顺。
将（2）句译成中文。
回答问题： When can we use matches or candles after an earthquake?
在文中找出与Most telephones will not be in service and radios will supply information for you.意思相同或相近的句子，并将它写在答题卡上。
在文中找出最能表达该短文主题的句子，并将它写在答题卡上。
When I was a child, my parents always told me that I should never talk to strangers. This was part of a whole list of things I should never do: Never accept food or candy from strangers, never get in a car with strangers, and so on.
But if we didn’t start a conversation with strangers, we’d never make new friends. We’d never get a job. We may miss the joy that comes from talking with strangers. And the more people you know, you more chances you can get.
The following passage offers you some advice on how to break the ice.
Don’t just stare at your shoes. Go and say “Hi” to that new guy. It will be easier to break the ice if you know more about different cultures.
British: Beautiful day, isn’t it?
The weather in Britain is changeable. So, it is one of the topics the British care most about. And there’s a simple rule: Say “Yes” whether you agree with the person’s idea on the weather or not. That’s because the British start a conversation using the weather so that they can continue their talk.
French: Where did you go on holiday?
To talk with a French person, the safest way is to ask his or her last holiday. French students enjoy a 10-to-15-day holiday every two months. French employees get more than six weeks of holidays per year.
American: So, where are you from?
The US is so big and people move so often that location is always a source(来源) of talk. You can try to find a connection with the place they’re from. For example, if someone’s from Los Angeles, you could say:“Oh, I have a friend who studied there”Why did the writer’s parents tell him not to talk to strangers?
| A．It was dangerous. |
| B．Is wasted time. |
| C．It was part of the life. |
| D．Their son didn’t like to talk to strangers. |
The best thing to talk with British is .
| A．the fog | B．the rain |
| C．the weather | D．the wind |
To talk with a French person, the safest way is .
| A．his or her family | B．his or her parents |
| C．his or her friends | D．his or her last holiday |
The location is always a source of talk in America because .
| A．They are energetic |
| B．They love their home |
| C．Los Angeles is their location |
| D．The US is so big and people move so often |
According to the passage, the writer thinks .
| A．his parents were right |
| B．he can talk with strangers freely |
| C．It is necessary to talk with strangers |
| D．he can find jobs easily |
Do you know star anise? It has a Chinese name “bajiao”(八角). You can find this spice(调味料) in almost all Chinese kitchens. Suddenly people around the world need the small fruit from which the spice is made, because of bird flu(禽流感). 
Bird flu has made tens of millions of birds die and killed at least 60 people in Asia. Scientists say if flu changes to spread from person to person, it could kill millions!
A medicine called Tamiflu(达菲) is supposed to fight bird flu in humans. Roche, a Swiss company, developed it. But Roche says it hasn’t enough raw material(原料) to make lots of Tamiflu. The material is the Chinese spice star anise.
About 90% of the world’s star anise is produced in South China. The fruit is harvested(丰收) between March and May. Besides spice, people also use it as medicine.
People afraid of bird flu have begun to buy star anise and cook chicken and other meat with it more. But so far, no scientists say the spice could give protection(保护). Some scientists say that eating the fruit itself won’t help against bird flu.Most world’s star anise is produced in .
| A．Swiss | B．Africa | C．Asia | D．South China |
According to the passage, the underlined word “supposed” probably means .
| A．thought | B．should | C．felt | D．ought |
Star anise is harvested .
| A．for one month | B．for half a year |
| C．for almost three months | D．All year round |
What’s the main idea of this passage?
| A．The introduction of star anise. |
| B．The influence of bird flu. |
| C．The introduction of Tamiflu. |
| D．Star anise is used to make medicine to help fight bird flu. |
Which one is NOT right according to the passage?
| A．Star anise is a kind of spice. |
| B．Most star anise is produced in China. |
| C．Bird flu is dangerous for people. |
| D．Scientists say spice can help against bird flu. |
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