Before roads needed traffic lights, railways had used signals(信号)to control train traffic. In early days, these signals included a ball and something that looked like a kite. When the kite was on top, it meant danger；when the ball was raised. it was safe.
In 1841, a developed railway signal was used at the London station. It included a signal arm in the horizontal(水平的)position which meant "stop". The signal was painted red so that it was easy to see and could attract the drivers' attention.
At night, oil lights were added on the top. A red light meant stop and a white light meant the drivers could go on.
In January 1876, a train knocked on another train running ahead on the same road, because the signals were not clear enough. 13 people were killed in the accident and the others were badly hurt.
Then people changed the signal. The signal for "stop" became a red light and a yellow light was added to tell the drivers to drive carefully. In 1893. a green light took the place of the white light, because the white light was often mistaken for a street or house light.
Since railway signals were introduced, city of officials(官员)decided to try them out on the roads of London.
- ( )1. In early days, what did people use to control train traffic?
A. A ball.
B. Something that looked like a kite.
D. A and B.
- ( )2. What did a white light mean in 1842?
A. The drivers must stop.
B. The drivers could go on.
C. It could attract the drivers' attention.
D. It was dangerous.
- ( )3. What happened in 1876?
A. There were 31 people killed in an accident.
B. There were few people hurt in an accident.
C. A train knocked on another train.
D. City officials decided to try three colors of lights out on the roads.
- ( )4.The passage mainly tells us_____.
A. the development of railway signal
B. the signal used to control train traffic
C. how train accidents happened
D. the different colors of traffic lights
- ( )5. The best title for this passage is“_____”
A.Colorful Traffic Lights
B.The problem of Traffic Signals
C. Road Signals
D. Railway Signals
6.个人问题:What is a traffic light? Why does it come in three colors?至少50个单词。
小组问题:What is a traffic light? Why does it come in three colors?至少60个单词。
Environmental Protection Agency(EPA)is a part of the federal(联邦的)government. It wants to improve Americans Environment. The EPA was founded in 1970.President(总统) Richard Nixon suggested the idea for this group. Before this time, there was not one group only taking care of the environment. The EPA was founded because Americans worried about the environment. They wanted cleaner water, air and land.
The EPA received this huge task——improving the environment. Staff(工作人员)in the EPA were asked
to write new ideas in order to make sure a cleaner environment can come true. The EPA has had many in the EPA was asked to write new ideas in order to make sure a cleaner environment can come true. The EPA has had many projects. They ask people to make a good use of energy. They also keep our air and water clean. And the EPA is always doing researches all the time to find new and better ways to keep our environment clean and healthy. There is also a project to help animal population increase. Slowly the work of the EPA is making our environment cleaner for all living in it.
- ( )7. Environmental Protection Agency is in_____.
- ( )8. The EPA appeared in____.
- ( )9. The EPA only takes care of____.
A. President Richard Nixon
D. animal populations
- ( )10. Why were people in the EPA asked to write new ideas?
A. To protect the environment.
B. It is a better and new way to keep our environment clean and healthy.
C. To help animal populations increase.
D. To make sure a cleaner environment can come true.
- ( )11. How does the EPA look for new and better ways to improve our environment?
A. By doing researches all the time.
B. By getting the ideas from their president.
C. By writing the e new ideas by itself.
D. By asking people in their country.
12.个人问题:What are the EPA's responsibilities（职责）? How do we protect the environment? 至少50个单词。
小组问题:What are the EPA's responsibilities（职责）? How do we protect the environment? 至少60个单词。
People all over the world are looking for ways to save energy and natural resources(资源) to protect our environment. Here's an example of saving water.
A doctor called called Jack and Todd is very interested in cleaning water as well as saving money, so he has tried many ways, and in the end he developed a small and affordable system to clean waste water-the Living Machine. The machine can clean waste water in our home and in our business.
The machine can clean waste water. First, the waste water goes into a big plastic tank. In the tank, the wastes start to break down. Second, a few days later, the water is brought into a greenhouse full of plants and fish. With the help of sunlight, plants and animals, many chemicals can be removed from the water. That makes the water cleaner. Then the water can be used for washing or bathing. Though it can’t be used for drinking or cooking, the water is clean enough to water the flowers, wash the dog and bathe.
This technology is good for the environment. It can also help to save fresh water and it can help provide the unpolluted water. If we take actions to do something to save energy on the earth, our planet will have a longer life and our life will be better.
- ( )13. Who developed the machine that can make waste water into fresh water?
A. A teacher.
B. A soldier.
C. A doctor.
D. An engineer.
- ( )14. Where is the Living Machine used?
A. In our home and In our business.
B. In a factory and in a company.
C. In a company and in our business.
D. In our home and in a factory.
- ( )15. What is the water cleaned by the machine used for?
D. Washing and bathing
- ( )16. Which of the following is TRUE?
A. The Living Machine needn't sunlight.
B. A few days later, the water is brought into a greenhouse full of plants and fish.
C. Cleaning waste water in the machine is very easy.
D. This technology is good for the farmers.
- ( )17. What's the main idea of the passage?
A. The Living Machine is used to clean sea water.
B. The Living Machine can clean waste water.
C. The Living Machine can provide fresh water for people.
D. The Living Machine is good for the environment and it can save energy.
18.个人问题:How does the Living Machine save water? And how can we save water in our daily life?至少50个单词。
小组问题:How does the Living Machine save water? And how can we save water in our daily life?至少60个单词。
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