In 1931, it was discovered that some unknown substance present only in certain foods was necessary for good health. This substance was what is now called “Vitamin A”.
Vitamin A's biggest job is to keep the eyes going. Without it, people and animals get “night blindness” and eye problems. Lack of Vitamin A for a long time can even cause total blindness, particularly among children. This had a chance to be tested in Denmark during World Was I. Because of food shortage, many children had to eat man-made butter and skim milk（脱脂奶）, which contains no Vitamin A. Soon, they developed eye diseases. It was after they were given real butter and whole milk that they had no eye problems.
After Vitamin A was discovered, it took more than thirty years of experiments for scientists to be able to get a small amount of pure Vitamin A. Vitamin A is manufactured and is used successfully to treat a number of diseases. You can easily get enough Vitamin A by eating a variety of food. Good sources of Vitamin A are liver（肝脏） from some animals and dairy products such as milk and cream. Not only many vegetables contain carotene（胡萝卜素）, from which your liver can make its own Vitamin A, some fruits also provide carotene which helps your liver to supply Vitamin A. As long as you are getting Vitamin A from food you won't need to take any extra in the form of liquid or pills.
(1)According to the passage, if Vitamin A is not provided enough, which of the following are likely to be affected most se riously?
[ ]
(2) Vitamin A is a very. important substance mainly because it _______.
[ ]
A．is hard to made
B．helps to keep one's eyes healthy
C．can make butter more delicious
D．can not be produced in large quantity
(3) What made the children in Denmark get eye diseases during World War I?
[ ]
A．The war they experienced.
B．Their poor housing conditions.
C．The experiments on food.
D．The lack of Vitamin A in their food.
(4) According to the text, the following are all good sources of Vitamin A except _______.
[ ]
(5) Which of the following could be the best title of the passage?
[ ]
科目：高中英语 来源：2004全国各省市高考模拟试题汇编(天利38套)·英语 题型：050
阅读理解
阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
Thomas Alva Edison lit up the world with his invention of the electric light. Without him, the world might still be a dark place. However, the electric light was not his only invention. He also invented the phonograph, the motion picture camera, and over 1,200 other things. About every two weeks he created something new.
Thomas A. Edison was born in Milan, Ohio, on February 11,1847, His family moved to Port Huron, Michigan, when he was seven years old. Surprisingly, he attended school for only two months. His mother, a former teacher, taught him a few things, but Thomas was mostly self - educated. His natural curiosity led him to start experimenting at a young age with electrical and mechanical things at home.
When he was 12 years old, he got his first job. He became a newsboy on a train that ran between Port Huron and Detroit. He set up a laboratory in a baggage car of the train so that he could continue his experiments in his spare time. Unfortunately, his first work experience did not end well. Thomas was fired when he accidentally set fire to the floor of the baggage car. Thomas then worked for five years as a telegraph operator, but he continued to spend much of his time on the job conducting experiments. He got his first patent in 1868 for a vote recorder run by electricity. However, the vote recorder was not a success. In 1870, he sold another invention, a stock - ticker, for $ 40,000．A stock - ticker is a machine that automatically prints stock prices on a tape. He was then able to build his first shop in Newark, New Jersey.
Thomas Edison was totally deaf in one ear and hard of hearing in the other, but thought of his deafness as a blessing in many ways. It kept conversations short, so that he could have more time for work. He called himself a “two - shift man” because he worked 16 out of every 24 hours. Sometimes he worked so intensely that his wife had to remind him to sleep and eat.
Thomas Edison died at the age of 84 on October 18, 1931, at his estate in West Orange, New Jersey. He left numerous inventions that improved the quality of life all over the world.
1．Thomas Edison did things in this order: ________.
[ ]
A．he became a telegraph operator, a newsboy, and then got his fist patent
B．he became a newsboy, got his fist patent, and then became a telegraph operator
C．he got a patent, became a telegraph operator, and then became a newsboy
D．he became a newsboy, a telegraph operator, and then got a patent
2．Of all the inventions, ________ was probably the most important for civilization.
[ ]
A．the vote recorder
B．the stock ticker
C．the light bulb
D．the motion picture camera
3．The main idea of this passage is ________.
[ ]
A．Edison was always interested in science and inventions, and he invented many important things
B．Thomas Edison could not keep a job
C．Thomas Edison worked day and night on his experiments
D．Deaf people make good inventors without the distraction of spoken conversation
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科目：高中英语 来源： 题型：053
阅读理解：
A giant dam (坝) was built many years ago to control the Colorado(科罗拉多) River in the US. This dam was built to protect the land and houses around the river.
This huge dam is in the Black Canyon, It is possible to drive a car from one side of the river to the other on a road which is on top of the dam. This dam is so big that there is an elevator inside. The eleveator goes down forty-four stories from the road to the bottom. There is enough concrete（混凝土）in this dam to build a highway from New York to San Francisco. Thousands of people worked on this dam for five years.
This huge dam was called Boulder Dam when it was finished in 1936. Later it was renamed Hoover Dam in honor of a president of the United States. Hoover Dam, one of the highest dams in the world, is situated between the States of Arizona and Nevada(内华达).
( )1. Boulder Dam was built to ______ .
A. protect the land nearby B. honor a US president
C. make a highway D. produce electricity
( )2. There is a road on top of the dam, which is probably connected with ______ .
A. the elevator B. the river
C. the border(边界)of the two states D. the main highway
( )3. The word “stories” means ______ .
A. a short history B. the floors
C. something that is not true D. some books
( )4. Workers probably began to build this dam in ______ .
A. 1926 B. 1931
C. 1934 D. 1932
( )5. Hoover Dam lies ______ .
A. between Arizona and Nevada
B. in the Black Canyon
C. between New York and San Francisco
D. Both A and B
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科目：高中英语 来源：四川省成都石室中学2012届高三上学期期中考试英语试题 题型：050
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科目：高中英语 来源：河北省邢台一中2011－2012学年高一下学期期末考试英语试题 题型：054
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科目：高中英语 来源：江西省上饶市2012届高三第二次模拟考试英语试题 题型：054
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