1 . Traffic lights are red, yellow and green. They are very important signals (信号). Traffic lights are usually placed at busy street corners to help control traffic. Sometimes, they are on streets near schools and shops, too. Most young children are taught what each of the colored lights means, so everybody can stay safe.
The first traffic signals were used for trains. The signals were put alongside railway tracks (轨道). The color red was used to mean “stop” because it warned people of danger. A red light was also the easiest color to see from a distance. Train drivers could see the red “stop” light ahead and had enough time to slow down and stop their trains. A green light was used to mean “take care” and a white light meant “go”.
However, there were many dangerous accidents on the train tracks. Some train drivers thought a star shining in the night sky was a white light that meant “go”. So the signals were swapped. The “go” light was changed to green and the “take care” light was changed to white.
During these times, people travelled by train or in carts pulled by horses. Years later, when cars were built, people began to drive them because they could travel much faster than horses. However, the road rules for drivers were not very clear and many people were hurt crossing the roads. Yellow warning signs had to be placed beside the roads to remind drivers to take care and allow people to cross safely.
Today, towns and cities all over the world have traffic lights. Red and green lights match the signals used on the railways. Yellow lights are easy to see, so they are used to warn drivers that they should slow down and prepare to stop.
1. Why was the color red used to mean “stop”?A.It reminded people of traffic rules. |
B.It helped trains run smoothly. |
C.It gave people a warning of danger. |
D.It was the first color people thought of. |
A.Designed. | B.Exchanged. | C.Suggested. | D.Compared. |
a. A white light b. A green light. c. A yellow light.
A.a一c一b | B.b一c一a | C.a一b一c | D.b一a一c |
A.The advantages of traffic lights. | B.The history of traffic lights. |
C.The importance of traffic lights. | D.The meanings of traffic lights. |
Most people today use coins, paper money, or credit cards to buy things. However, shopping wasn’t always as easy
About 10,000 years ago, people farmed and
About 3,000 years ago, people started to use other things as money. Shells from the ocean were
It wasn’t until about 2,000 years ago that the first coins appeared. China was probably the first place to use metal coins. People made
But it’s not convenient to carry around a lot of heavy coins,
3 . Just like Mickey Mouse, Hello Kitty is a famous cartoon character. You can see her on many
44 years ago, a Japanese company Sanrio made Hello Kitty. It first
Hello Kitty is in the third
The artist said 44 years ago, many Japanese worked and
A.shapes | B.kinds | C.colors | D.prices |
A.cute | B.careless | C.angry | D.possible |
A.wrote | B.brought | C.appeared | D.turned |
A.hope | B.surprise | C.answer | D.dream |
A.girl | B.boy | C.cat | D.dog |
A.laughing | B.talking | C.standing | D.eating |
A.floor | B.grade | C.name | D.place |
A.drink | B.person | C.restaurant | D.food |
A.inside | B.from | C.near | D.far |
A.bike | B.car | C.horse | D.bus |
A.friends | B.teachers | C.grandparents | D.classmates |
A.interesting | B.important | C.different | D.normal |
A.played | B.lived | C.solves | D.invited |
A.Australia | B.British | C.Chinese | D.American |
A.difficult | B.meaningless | C.happy | D.unlucky |
4 . Horses are useful animals to human beings. Domestic (驯养的) horses now pull ploughs (耕地), race in the Kentucky Derby, and carry police. But early horses weren't tame (驯服的) enough to perform these kinds of tasks. Scientists think the first interactions humans had with horses were far different from those today.
Thousands of years ago, people killed the wild horses that lived around them for food. Over time, people began to catch the animals and raise them. This was the first step in domestication.
As people began to tame and ride horses, they chose to keep those animals that had more desirable characteristics. For example, people may have chosen to keep horses that had a gentle personality so they could be ridden more easily. People who used horses to pull heavy loads would have chosen to keep stronger animals. Characteristics like strength are partly controlled by the animals' genes. So as the domesticated horses reproduced, they passed the characteristics on to their young. Each new generation of horses would show more of these chosen characteristics.
Modern day horse breeds (血统) come in a wide variety of shapes and sizes. This variety didn't exist in the horse population before domestication. The Shetland horse is one of the smallest breeds—typically reaching only one meter tall. With short, strong legs, the animals were bred (养育) to pull coal out of mine shafts (矿井) with low ceilings. Huge horses like the Clydesdale came on the scene around 1700. People bred these heavy, tall horses to pull large vehicles used for carrying heavy loads.
The domestication of horses has had great effects on societies. For example, horses were important tools in the advancement of modern agriculture. Using them to pull ploughs and carry heavy loads allowed people to farm more efficiently. Before they were able to ride horses, humans had to cross land on foot. Riding horses allowed people to travel far greater distance in much less time. That encouraged populations living in different areas to interact with one another. The new form of rapid transportation helped cultures spread around the world.
1. Before domestications horses were ________.A.caught for sports | B.hunted for food | C.made to pull ploughs | D.used to carry people |
A.it is smaller than the Clydesdale horse |
B.horse used to have gentle personalities |
C.some horses have better shaped than others |
D.horses were of less variety before domestication |
A.carrying heavy loads | B.changing farming methods |
C.serving as a means of transport | D.advancing agriculture in different areas |
A.why humans domesticated horses |
B.how humans and horses needed each other |
C.why horses came in different shapes and sizes |
D.how human societies and horses influenced each other |
HISTORY of Hot Dog The 1600s A German called Johann Georghehner created the "dachshund" sausage. "Dachshund" is a German small long thin dog. The 1860s The very first hot dog - the "dachshund" sausage in a roll - was sold by Germans in New York. It became popular in the US later. 1871 Charles Feltman, a German, started the first Coney Island hot dog stand. It made hot dogs known to more people. 1893 Chris Von Der Ahe started the American tradition of eating hot dogs at baseball parks, making hot dogs more popular. 1901 A New York cartoonist. Tad Dorgan, saw the red hot "dachshund sausages sold on streets. He wanted to draw a picture of it, but he wasn't sure how to spell "dachshund, so he simply wrote "Hot Dog". It is widely believed how Hot Dog had its name. 1949 The first vegetarian hot dogs came out. | HOT DOG FUN FACTS World record for eating hot dogs: 73 in ten minutes. Hot dogs were one of the first foods eaten on the moon ! About 150 million hot dogs are eaten by Americans each July 4th. About 21 million hot dogs were sold at American baseball parks in 2010. New Yorkers eat more hot dogs than any other city population in the US. |
1. Americans started the tradition of eating hot dogs at baseball parks in ___________.
A.1871 | B.1893 | C.1901 | D.1949 |
A.Tad Dorgan | B.Charles Feltman |
C.Chris Von Der Ahe | D.Johann Georghehner |
A.New Yorkers like eating hot dogs most in the world. |
B.Germans eat about 150 million hot dogs each July 4th. |
C.A world record says someone ate 73 hot dogs in 10 minutes. |
D.About 21 million hot dogs were sold in America in the 1860s. |
In Australia there is a famous island called Fraser Island. A great many visitors come here for holidays every year. Why? The reason is that it is special.
Though the island is a popular place of interest, there is no airport on the island. The long beach along the east coast works as the airport.
On the island there are sand hills without any plants, but there are forests with old trees, beautiful flowers and over a hundred lakes, too.
Every year, visitors come to enjoy the island's natural beauty. People like camping and hiking there.
A.Planes arrive and leave from here |
B.Anyone who breaks the rules will be punished |
C.The island is completely made of sand |
D.Unluckily, visitors have caused many problems |
E.Many kinds of birds and animals live in the forest |
F.So it is time to protect the environment of the island |
Next time you hold a book in your hands, stop and think. Like most other things in the modern world, it is the result of thousands of years of human invention.
First, came the invention of writing,
Later, the Greeks were well-known for their literature (文学) and science, but their "books" looked very different
For more than a thousand years, the pages of books were made from animal skin. That changed in
But the biggest change for books in Europe came in 1439, when Johannes Gutenberg invented the printing press. Before that, books in Europe were copied by hand, so they were very expensive. Many more people could afford the books
These days it is difficult
Will anyone turn the pages of a traditional book in the future,
8 . Canberra is
History Canberra is the eighth largest city in Australia. It is, about 238 km from Sydney and 507 km from Melbourne. Sydney is
Culture Canberra is a beautiful city
But modern soccer didn’t become official(官方的) until 1863. An Englishman called Cobb Morley introduced the idea of a soccer association(联盟).
It’s not easy to tell what makes soccer so popular.
No one knows who will win at the next World Cup. But one thing is certain: The world will be watching.
A.He also wrote the sport’s official rules. |
B.Soccer is the world’s favorite sport. |
C.Soccer performances are pleasing to the eyes. |
D.It’s hard to say where soccer’s birthplace is. |
E.But one reason is how simple the sport is. |
In China, writing brushes. ink sticks. paper and ink stones are called the
The writing brushes are
The ink stick is the pigment(颜料)used in writing and
Paper is one of
The ink stone was