In the eighteenth century, cities became larger and larger. People moved from the countryside to the cities because there was 1 work for them to do in the cities.
On Sundays and during holidays, they liked to 2 the cities and have a good time in the countryside, but not every 3 had a horse. People needed another kind of transportation. Inventors in many countries tried 4 this problem.
The first documented bicycle was invented by a German, Baron Von Drais, in the 1810s. It was a walking machine made 5 wood. People pushed their 6 against the ground to move forward. It 7 people to get around parks and gardens.
In 1865, pedals(踏板) were added to the front wheel. But when people 8 it on stones, they shook a lot.
In 1870, the first all-metal bicycle 9 rubber tyres(橡胶轮胎) was invented. But the two wheels were not the same 10. The front wheel was much larger than the back one. This machine was the first to 11 bicycle. However, it was hard to ride and it was very 12.
In the 1890s, chain drive, the pneumatic(充气的) tyre and same-sized wheels made the ride 13 and more comfortable. People loved it 14 it helped them enjoy more free time.
Bicycling became 15, not just with men but also with women.
A
Jupiter(土星) is the fifth planet from the sun and it is the largest one in the solar system. It is about 11 times bigger than the earth. Jupiter's strangest thing is its huge red spot. Pictures taken from space tell us that the red spot is probably a hurricane(飓风). It is so big that the earth would fit right in the middle of it. Sometimes the hurricane looks like a huge oven with orange-red waves (波浪). Some other time the color almost disappears.
On the earth, hurricanes move. We can watch them travel across water to land. Jupiter's red spot also moves. Scientists say it “walks”. It is carried along by air in Jupiter's atmosphere(大气层).
So far, Jupiter has been visited by four spacecrafts. All of them flew by Jupiter very quickly. On the next trip to Jupiter, a spacecraft will stay near the planet much longer. New information will be sent back to the earth. Soon scientists will know much more about this strange red spot in the atmosphere.
B
With the development of science, more and more students don't like taking notes by hand. Instead, they use digital cameras to take pictures of the words that their teachers write on the blackboard or record what their teachers say in class.
The children might think there are too many notes to take or their teachers write or speak so fast that they can't take more specific notes. They are trying to find ways to make things easier, so they use digital cameras. In fact, children are very clever to make use of technology.
But do digital cameras really make taking notes easier?
Not really. Before you read notes from digital cameras, there are a lot of things you have to do. To begin with, you have to find a computer. Then you need to copy the photos into the computer. Next, you have to find a printer(打印机) to print the photos. Another thing is that you can't hear the sound from the digital cameras clearly because there is usually lots of noise. You will have to listen to it slowly several times before you understand everything.
In fact, taking notes by hand has many advantages. For example, it can help you remember and understand what you are learning. In order to save time, you can choose the most important things or the things you don't understand to write down. You don't have to write down everything.
Don't be afraid to take notes by hand. It's really an effective(有效的) way.
C
Shopping on the Internet is becoming more and more popular. Why do people use the Internet to shop? Some people say it is more convenient. They don't have to leave their homes to order something; ① ; they can find things for sale that they can't find in the stores near their homes. ② .
If you want to buy something on the Internet, you need a credit(信用) card. You have to type your credit card number and information on the website and send them to the store over the Internet. You have to be sure that the store will not use your information in the wrong way. You don't want someone to get your credit card number, so be careful with it, because people sometimes steal credit card numbers from stores.
The Internet is also a good place to go window-shopping. Window-shopping is when you look at the things for sale in a store, but don't plan to buy anything. In window-shopping you can see what kinds of things you are able to get and how much they cost. Some stores like Ross Stores have a website for information about their stores, but not for shopping. Some stores have a website for information about their stores, and can shop on-line there, such as Office Depot, Payless Shoe Source, Safeway. Some stores like Amazon. com are only for on-line shopping.
A. Still other people say they can find better prices on the Internet
B. they can get things with more money
C. they can shop for anything they want at any time
① ②
that a new movie will be on tonight.
The children want to know the rain .
Walking sticks can helping disabled people to walk.
Just give me an opportunity and I'll it you.
I know that he's there, but he doesn't answer me.
die, what, scientist, change, something |
A: Have you learned Topic 2, Unit4?
B: No, not yet. We will begin to learn it next week.
A: But we've learned it. It's about some like Edison, a great American inventor.
B: I have read about Edison in a book, so I know about him.
A: Really?
B: Yes. He invented a lot of things. And they all have the world.
A: I know he was born in 1847, and died in 1931.
B: So he has been for more than eighty years.
A: Yes, but we can remember him every day.
B: Sorry, I don't understand you mean.
A: Do you give your friend a call every day?
B: Yes. Oh, I see. Edison invented the telephone.
