Is there intelligent (有智力的) life on other planets? For years, scientists said “no.” or “we don’t know.” But today this is changing. Seth Shostak and Alexandra Barnett are astronomers(天文学家). They believe intelligent life exists (存在) somewhere in the universe. They also think we sill soon contact these beings(人；生物).
Why do Shostak and Barnett think intelligent life exists on other planets? The first reason is time. Scientists believe the universe is about 12 billion years old. “This is long enough for other planets to have intelligent life,” say Shostak and Barnett. The second reason is size—the universe is huge. “Tools like the Hubble Telescope(哈勃望远镜) have shown that there are at least 100 billion galaxies,” says Shostak. “And our galaxy, the Milky Way, has at least 100 billion stars. Some planets going around these stars might be similar to Earth.”
In the past, it was hard to look for signs of intelligent life in the universe. But now, powerful telescopes(高倍望远镜) allow scientists to discover smaller planets—the size of Mars or Earth—in other solar systems. These planets might have intelligent life.
Have beings from space already visited Earth? “Probably not,” says Shostak. “It’s a long way away. However, intelligent beings may contact us in other way, such as radio signals(信号). In fact, they may be trying to communicate with us now, but we don’t have the right tools to receive their messages. However, this is changing. By 2025, we could make contact with other life forms in our universe and we might help each other.”
1.Seth Shostak and Alexandra Barnett are _____.
A. astronomers B. farmers
C. singers D. drivers
2.What is the best title for Paragraph 2?
A. The Age and Size of Earth
B. Our Galaxy: The Milky Way
C. Why Intelligent Life Might Exist
D. Earth: The Only Planet with Intelligent Life
3.Why was it hard to look for signs of intelligent life in the universe in the past?
A. There were not any smaller planets.
B. There were not any powerful telescopes.
C. The astronomers were not interested in them.
D. The Milky Way didn’t exist at that time,
4.Why haven’t beings from space visited us yet according to Shostak?
A. They’re afraid of us.
B. It’s a long way away.
C. They don’t want to see us.
D. They don’t know how to use radio signals.
A man had a little dog, and he was very fond of it. He would pat its head, and take it on his knee, and talk to it. Then he would give it little bits of food from his own plate. A donkey looked in at the window and saw the man and the dog. "Why does he not make a pet of me?" said the donkey. "It is not fair. I work hard, and the dog only wags its tail, and barks, and jumps on its master's knee. It is not fair."
Then the donkey said to himself, "If I do what the dog does, he may make a pet of me." So the donkey ran into the room. It brayed as loudly as it could. It wagged its tail so hard that it knocked over a jar on the table. Then it tried to jump on to its master's knee. The master thought the donkey was mad, and he shouted, "Help! Help!" Men came running in with sticks, and they beat the donkey till it ran out of the house, and they drove it back to the field.
"I only did what the dog does," said the donkey," and yet they make a pet of the dog, and they beat me with sticks. It is not fair."
1.The man liked the dog. He did a lot except __________.
A. patting the dog’s head B. sleeping with the dog
C. talking to the dog D. taking the dog on his knee
2.Which is not the reason why the man treated the dog well?
A. It barked
B. It worked hard.
C. It jumped on the master’s knee
D. It wagged its tail
3.What happened to the donkey at last?
A. The donkey jumped onto the man’s knees.
B. The man liked it as the dog.
C. The donkey was driven back to the field.
D. The men beat it to death.
完形填空
The United States is full of automobiles (机动车). There are still many families without cars. But some families have two or more cars. However, cars are used for more than pleasure. They are a part of life.
Cars are used for . They are driven to offices and factories by workers who have no other way to their jobs. When salesmen are sent to parts of the city, they have to drive in order to their products. Farmers have to drive into the city in order to shop for hecessities.
Sometimes, small children must be driven to . In some cities, school buses are used only when children more than a mile from the school. When the children are too to walk that far, their parents take to drive them to school. One drives on Mondays, taking her children and the neighbors' children as well. Another mother drives on Tuesdays, another on Wednesdays and so on. This is forming a car pool (拼车). Working people also form car pools, with three or four people taking turns to drive to the place they work. More car pools should be formed in order to put cars on the road and to use less oil. is a great problem, and so is the traffic in and around cities. Too many cars are being driven. Something should be done about the use of cars.
1.A. even B. much C. little D. such
2.A. great B. necessary C. proper D. possible
3.A. families B. business C. education D. Farms
4.A. get to B. look for C. find out D. use up
5.A. same B. different C. every D. each
6.A. catch B. create C. cover D. carry
7.A. cities B. schools C. parks D. gardens
8.A. move B. study C. live D. Work
9.A. small B. big C. young D. old
10.A. money B. time C. pride D. turns
11.A. parent B. child C. way D. car
12.A. call B. calling C. to call D. called
13.A. where B. that C. which D. when
14.A. more B. fewer C. many D. less
15.A. Driving B. Running C. Parking D. Forming
—Would you mind helping me look after my baby for a while?
— ____________
A. Sure, be careful on the way.
B. Oh, don’t you like children?
C. Of course not, dear.
D. Yeah, I hope so.
—What else should we pay attention to ________ building the bridge?
—The change of the weather, I think.
A. finishing B. finished
C. to finish D. finish
I think the talk is wonderful, it’s worth ________.
A. to listen B. to listen to
C. listening to D. listening
