Even if you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity.
You can easily find out the pull of the earth. If you weigh yourself, you will know how much gravity is pulling you.
Since there is gravity, water runs down hill. When you throw a ball into the air, it falls back down. Because of gravity, you do not fall off the earth as it whirls (旋转) around.
Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. Then spaceship will go so fast that it can escape (逃出) the earth’s gravity and carry you into space.
1. In this passage, the word “gravity” means.
A. the pull of everything.
B. the force of attraction(吸引) among objects.
C. the force which attracts objects towards the centre of the earth
D. the force which attracts the earth towards the sun.
2. When you slip(滑) you always fall to the ground because
A. the earth always turns round. B. the earth has gravity
C. the earth’s gravity is greater than your weight. D. you are careless.
3. Gravity is strong that
A. it can throw a ball into the air. B. it makes you jump only seven feet.
C. it can let you fly away from the earth. D. it can keep everything on earth.
4. Because of gravity,
A. water flows everything. B. we can go everywhere by ship.
C. water always flows downwards. D. fish can live in water.
5. We can get away from the earth by spaceship because
A. the spaceship goes very fast. B. the earth can’t pull the spaceship.
C. the spaceship has a strong force. D. the spaceship can jump higher than other things.
An expensive car speeding down the main street of a small town was soon caught up with by a young motorcycle policeman. As he started to make out the ticket, the woman behind the wheel said proudly, “Before you go any further, young man, I think you should know that the mayor of this city is a good friend of mine.”The officer did not say a word, but kept writing. “I am also a friend of chief of police Barens,”continued the woman, getting more angry each moment, Still he kept on writing. “Young man,”she persisted, “I know Judge Lawson and State Senator (参议员) Patton.” Handing the ticket to the woman, the officer asked pleasantly , “Tell me, do you know Bill Bronson.”
“Why, no,”she answered.
“Well, that is the man you should have known,”he said, heading back to his motorcycle, “I an Bill Bronson.”
1. The policeman stopped the car because_____
A. it was an expensive car
B. the driver was a proud lady
C. the driver was driving beyond the speed limit
D. the driver was going to make trouble for the police
2. The woman was getting more angry each moment because _____.
A. the policeman didn’t know her friends
B. the policeman didn’t accept her kindness
C. the policeman was going to punish her
D. she didn’t know the policeman’s name
3. The policeman was _______.
A. an honourable fellow B. a stupid fellow
C. an impolite man D. a shy man
4. The woman was _______.
B. a person who depended on someone else to finish her work
C. trying to frighten the policeman on the strength of her friends’ powerful positions
D. introducing her good friends’ names to the young officer
5. The policeman _______.
A. had no sense of humor (幽默) B. had s sense of humor
C. had no sense of duty D. was senseless
Elizabeth Blackwell was born in England in 1821, and moved to New York City when she was ten years old. One day she decided that she wanted to become a doctor. That was nearly impossible for a woman in the middle of the nineteenth century. After writing many letters asking for admission(录取) to medical schools, she was finally accepted by a doctor in Philadelphia. She was so determined that she taught school and gave music lessons to get money for the cost of schooling.
In 1849, after graduation from medical school. she decided to further her education in Paris. She wanted to be a surgeon(外科医师) , but a serious eye problem forced her to give up the idea.
Upon returning to the United States, she found it difficult to start her own practice because she was a woman. By 1857 Elizabeth and her sister, also a doctor, along with another woman doctor, managed to open a new hospital, the first for women and children Besides being the first woman physician and founding her own hospital , she also set up the first medical school for women.
1. Why couldn’t Elizabeth Blackwell realize her dream of becoming a surgeon?
A. She couldn’t get admitted to medical school
B. She decided to further her education in Paris
C. A serious eye problem stopped her
D. It was difficult for her to start a practice in the United States
2. What main obstacle(障碍) almost destroyed Elizabeth’s chances for becoming for a doctor?
A. She was a woman.
B. She wrote too many letters.
C. She couldn’t graduate from medical school.
D. She couldn’t set up her hospital.
3. How many years passed between her graduation from medical school and the opening of her hospital?
A. Eight years B. Ten years C. Nineteen years D. Thirty-six years
4. According to the passage, all of the following are “firsts” in the life of Elizabeth Blacekwell,
except that she ______.
A. became the first woman physician
B. was the first woman doctor
C. and several other women founded the first hospital for women and children
D. set up the first medical school for women
5. Eilzabeth Blackwell spent most of her lift in _______.
A. England B. Paris C. the United States D. New York City
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