初二英语上册Unit4Inventions课后练习题

详细内容

puter was one of the most important inventions of last century. The first puter was as large as a room. Now some puters are as 1 as television sets. Some puters can even be made smaller than a book. About 20 years 2 , the puter was a strange machine in china. Not many people
understood it and said yes to it.
Today much of that is 3 . In 1984, when Deng Xiaoping 4 two pupils working on the puters in Shanghai, he said that puter lessons would start from children. So there was the first puter book for middle school students. Now in shanghai 5 all middle school have classrooms for puter courses(课程). Some of the students now have their 6 puters at home. With the help of inter (因特网),they can send and 7 messages and emails. They can learn about the world more quickly. Now puter
are 8 used in banks, factories, airports and so on. The puter is ing into everyone's 9 , so it is important for us to learn 10 to use a puter freely.
( ) 1. A. huge
( ) 2. A. over
( ) 3. A. changing
( ) 4. A. looked
( ) 5. A. most
( ) 6. A. new
( ) 7. A. receive
( ) 8. A. recently
( ) 9. A. life
( ) 10. A. when
B. small
B. before
B. moving
B. heard
B. almost
B. old
B. give
B. widely
B. live
B. where
C. great
C. long
C. turning
C. found
C. only
C. own
C. do
C. slowly
C. lives
C. how
D. little
D. ago
D. happening
D. watched
D. no
D. simple
D. make
D. carefully
D. living
D. why












三、阅读理解
A
Usually, students are not encouraged to run or jump around in the corridor
(走廊). However,students in a British grammar school really enjoy running on the corridor tiles (瓷砖) and their teachers even encourage them to do that.
Why? It is because the corridor was built with special kiic (动能的) tiles. When students jump on the tiles, electricity will be generated ( 产生). After one year, the electricity generated from the tiles can fully charge 853 mobile phones or power(供电) an electric car to drive seven miles. It’s amazing, isn’t it?
The corridor tiles are really a brilliant invention. Students ca n not only play on the corridor,but also help power the lights in their school corridors and other devices ( 设备) in their classrooms. Besides, this is a good way to teach students to be creative. They will be inspired to be scientists, inventors and engineers in the future to find clean energy for all humans.
The inventor of the magic corridor tiles is Laurence Kemball-Cook. He was once a student in this school. Now, he is CEO of his own pany. The corridor tiles are not Laurence’s only invention. He has also invented a special dance floor, which can be used at music festivals. It allows dancers to charge their mobile phones while they are dancing on the dance floor.
1. Why do the students in the passage enjoy running on the corridor tiles?
A. Because the corridor tiles are expensive.
B. Because the teachers ask them to do that.
C. Because the corridor was built with special tiles.
2. After one year, the electricity generated from the tiles can provide enough energy for _______.
A. over 800 mobile phones
B. all the lights of the school
C. an electric car to drive 70 miles
3. The underlined word “inspired” most probably means “ _________”.
A. encouraged B. forced C. trained
4. What else has Laurence invented besides the corridor tiles from the passage?
A. A mobile phone. B. A music player. C. A special dance floor.
5. Aording to the passage, which of the following statements is TRUE?
A. Students are not allowed to walk in the corridor.
B. Laurence once studied in the British grammar school.
C. Laurence has more than one pany of his own.
B
A 15-year-old student who invented a flashlight(手电筒) getting power from the holder's body heat is going home today from California with a big prize and a chance to do further research.
Ann Makosinski was the only Canadian among the four winners at Google's international science petition. Thousands of young scientists from around the world took part in the petition.
Winning the science and technology petition was "a surprise". Ann said, "I think it will have a great influence on my future."
Ann thanked her family for encouraging her interest in science and said that her first toy was a box of transistors(晶体管).
Ann's prize includes $ 25,000 and a "once in a-lifetime experice" from Google for her Hollow Flashlight, which has no moving parts or batteries.
The idea for the invention came from seeing unwanted batteries and her friend's experience. When Ann visited a friend in the Philippines, she s«w the friend couldn't study when it became dark because there was no electricity or light. She saw the need for a flashlight that has no batteries - Hollow Flashlight.
In her project, Ann wrote "I made two flashlights that do not use any batteries or harmful materials. They do not create any noise and will always work. The flashlight needs at least a 5℃ temperature difference between the holder's body and the environment around to produce light."
A video of Ann explaining how she creatcd the flashlight has been watched more than 1.4 million times on the Inter.
Though Ann was suessful, she has not made a decision about her career path. Ann hope that she can find a way to join her love of film and science together.
The four winners were chosen from 15 final petitors from eight countries. The petition attracted thousands of students in 120 countries.
1.In which part of a newspaper can we probably read this passage?
A. Travel. B. Culture. C. Technology. D. Advertisement.
2. The first paragraph is written to be a(n) ________.
A. introduction B. warning C. argument D. discussion
3.Paragraph 6 mainly tells us ________.
A. what Ann saw in the Philippines
B. why Ann invented Hollow Flashlight
C. how Ann's family encouraged her interest
D. what prize Ann got for Hollow Flashlight
4.Aording to the passage, we learn ________.
A. easy to win the international science petition
B. Hollow Flashlight is safe, noiseless and can save energy
C. Ann has made a decision to be a scientist in the future
D. few people are interested in how Ann created the flashlight

C
To us, it seems so natural to put up an umbrella to keep the water off when it rains. But in fact the umbrella was not invented as protection against the rain. Its first use was as a shade(遮蔽)against the sun.
Nobody knows who first invented it, but the umbrella was used in very ancient times. Probably the first to use it were the Chinese, back in the eleventh century BC.
We know that the umbrella was used in ancient Egypt and Babylon as a sunshade. And there was a strange thing connected with its use : it became a symbol of honor and power(权力). In the Far East in ancient times, the umbrella was allowed to be used only by those in high office or by royal people such as the kings or queens.
In Europe, the Greeks were the first to use the umbrella as a sunshade. The umbrella was in mon use in ancient Greece, but it is believed that the first people in Europe to use the umbrella as protection against the rain were the ancient Romans. During the middle ages in Europe, the use of the umbrella almost disappeared. Then it appeared again in Italy in the late sixteenth century. And again it became a symbol of power.
Umbrellas have not changed much in style during all this time, though they have bee much lighter in weight. It wasn't until the twentieth century that the umbrellas for women began to be made in all kinds of colors.
1. Ancient people first used umbrellas as ____.
A. a symbol of honor B. protection against the sun
C. a symbol of power D. protection against the rain
2. Aording to the passage, the umbrella was probably first used in ancient ______.
A. Egypt . B. Babylon C. Rome D. China
3. The underlined word royal might mean _ in Chinese.
A.皇室的 B.富裕的 C.中产的 D.平民的
4. Aording to the passage, which of the following is NOT true?
A. The ancient Greeks used the umbrella in their daily life.
B. Europeans hardly used the umbrella during the middle ages.
C. The umbrellas for women were made colorful in ancient times.
D. The style of the umbrella hasn't changed a lot since it was invented
5. This passage is mainly about _____.
A. the sales of the umbrella B. the differences among umbrellas
C. the invention of the umbrella D. the history and the use of the umbrella

四、单词拼写
1.China was the first country to I paper.
2.The story was so f that we couldn’t help laughing.
3.The bed was very c , so she didn’t want to get up.
4.Amy always works hard in the d and has dance classes in the evening.
5.You can call me a today. I am free and I will be waiting for you.

五、完成句子
1.手机帮助人们互相保持联系。
The mobile phone helps people . each other.
2.让孩子们远离火。太危险了。
the children fires. It is to dangerous.
3.认真听，同时写下关键词。
Listen carefully and write down the key words
.
4.在她看来，英国食品不如中国食品美味。
In her opinion, English food is Chinese food.
5.伟大的发明帮助人们过上更好的生活。
Great inventions help people .