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One cold night, I was growing sick of my life in San Francisco．There I was walking home around one o’clock in the morning after a 1 practice at the theatre. With the opening night only a week away, I was still learning my lines by heart. I was having 2 handling my part-time job at the bank in the daytime and my acting at night at the same time. As I walked, I thought seriously about 3 both acting and San Francisco. I had 4 too much of city life.
As I walked down the 5 streets under the tall buildings, I felt very small and cold, so I began 6 both to keep warm and to keep away from any possible robbers. Very few people were still out except a few homeless people under blankets.
About a block from my 7 , I heard a sound behind me. I 8 quickly, half expecting to see someone with a knife or a gun. The street was empty. All I saw was a shining streetlight. Still, the noise had made me 9 ，so I started to run faster. Not until I reached my apartment building and unlocked the door did I 10 what the noise had been. It had been my wallet 11 to the sidewalk.
Suddenly I wasn’t cold or tired anymore. I ran out of the door and back to where I’d heard the noise. Although I searched the sidewalk 12 for 15 minutes, my wallet was nowhere to be found.
Just as I was about to quit the 13 , I heard the garbage truck stop to the sidewalk next to me. When a voice came from the inside, “Alisa Camacho?” I thought I was dreaming. How could this man know my name? The door opened and out jumped a small blonde man with an 14 look in his eyes. “Is this what you’re looking for?” He asked, holding up a wallet.
It was already 3 a.m. by the time I got into bed. I couldn’t get much sleep, but I had got my wallet back. I also had got back some 15 of city life. I realized the city couldn’t be a bad place as long as people were willing to help each other.
1．A．comfortable B．serious C．tiresome D．fortunate
2．A．comfort B．desire C．pain D．trouble
3．A．setting up B．giving up C．holding up D．picking up
4．A．expected B．changed C．controlled D．possessed
5．A．deserted B．crowded C．busy D．wild
6．A．running B．jumping C．moving D．marching
7．A．bank B．theatre C．apartment D．office
8．A．stood B．walked C．turned D．left
9．A．satisfied B．confused C．frightened D．annoyed
10. A．turn out B．figure out C．give out D．pull out
11. A．belonging B．adding C．sticking D．falling
12. A．aimlessly B．anxiously C．skillfully D．delightedly
13. A．discovery B．research C．hunt D．finding
14. A．amused B．unpleasant C．uneasy D．embarrassed
15. A．production B．judgment C．friendship D．appreciation
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Have you ever wondered why stems(茎)grow upwards and roots downwards? Why do plants always seem to turn towards the light and climbing plants run up rather than down? The answer is simple: auxin(生长素), a chemical substance that controls growth in plants.
Auxin gives away its secrets
Auxin is a plant hormone(激素). Darwin was already interested in it in the 19th century. Only in recent years, however, has the hormone started to give away its secrets, thanks to intensive molecular research. Auxin is produced in the young, growing parts 
of plants and then transported throughout the plant—to a lowlying stem for example. The stem needs to straighten out as soon as possible to be able to absorb the topside, resulting in the underside growing faster and the stem straightening out. For the same reason, plants in front of windows will always turn to the light. This active regulation of auxin transport allows plants to take ideal advantage of local and changing conditions.
A new means of transport for auxin
The transport of auxin through the plant plays a vital role. And, from all appearances, it is not a simple matter. The researchers identified an important new link and means of transport for auxin: PILS proteins (蛋白质). PILS proteins are vital for auxindependent plant growth and adjust the intracellular(细胞内的)storage of the hormone. It is exactly this compartmentalizing (分类) of auxin that seems functionally important for the various developmental processes.
Growing crops more efficiently: the right amount of auxin in the right place
Higher auxin levels at the right moment and in the right place result in better growth and greater harvest. Better adjustment of auxin levels would make plants grow more efficiently. The researchers hope to contribute to the development of more efficient growing processes by continuing to sort out auxin transport processes.
66. Which of the following is TRUE of auxin according to the text?
A. It helps the plant to bend at the right places while growing.
B．It prevents the roots of plants from growing faster.
C．It is no use when the surroundings have changed.
D．It helps the underside of plants grow faster than the topside.
67. What would make plants grow more efficiently?
A. Straightening out the stem.
B．The right amount of auxin in the right place.
C．Allowing plants to turn to the light.
D．Enough PILS proteins.
68. From Paragraph 3 we know that ________.
A. the researchers are not so sure if the transport for auxin is a new one
B．the levels of auxin remain the same during the growing processes of plants
C．PILS proteins delay the growth of plants
D．PILS proteins play an important part in the transport of auxin
69．According to Paragraph 2, the researchers got their results mainly by ________.
A. referring to Darwin's theory
B．observing plants straightening
C．doing intensive molecular research
D．watching plants in different places
70．Which of the following can be the best title for this passage?
A. Why Plants Grow Towards the Light?
B．Darwin's Dream Has Come True
C．How Did Scientists Find Out the Secret?
D．A New Way of the Growing of Plants
查看习题详情和答案>>In 1971 a young man who grew up very poor was travelling across the country, trying to make a new start for himself. Along the way he had completely run out of money and was forced to spend the night in his car. This continued until one morning, after a week of sleeping in his car, he walked nervously into a restaurant and ordered a big breakfast.
After eating his first good meal in weeks, he found himself lying to the waiter, telling him he had lost his wallet. The waiter, who was also the owner, walked behind the chair where the young man had been sitting. He bent down, and came up with a $20 bill that looked as if it had fallen on the floor and said, “Son, you must have dropped this,” the owner said. The young man couldn’t believe his luck! He quickly paid for the breakfast, left a tip, bought gas with the change, and headed West.
On the way out of town, he began to understand what the owner did. Maybe nobody dropped the money at all. “Maybe that fellow just knew I was in trouble and he helped me in a way that didn’t embarrass(使尴尬)me. So I just made a promise to help other people if I can.”
Later, he worked very hard and became a rich man. Now he lives near Kansas City. Each year he gives away thousands of dollars. He is known as the “Secret Santa” because at Christmas time each year, he personally hands money out to those on the street and at restaurants. Last year, he gave more than $50,000 away in Kansas City.
56The young man was travelling cross the country in 1971 to______.
A. look for a good restaurant B. improve his life
C. show his new car to others D. hand out dollars
57. The underlined sentence implies(暗示) that the young man got to know that ______.
A. it was vey lucky of him to get his lost money back
B. it was very honest of the owner to return his money
C. the owner helped him in a way that didn’t hurt his feelings
D. another person who had breakfast in the restaurant lost the money
58. From the end of the passage we can learn that ______.
A. the man did carry out his promise B. the man was not successful in the end
C. the owner was paid back the money D. Santa gives the man money each year
59. The message of the story is “______”.
A. One good turn deserves another B. Where there is a will there is a way
C. He who travels far knows much D. Give love wings (翅膀) and it may fly higher
查看习题详情和答案>>You can．be proud of yourselves，even if you can only make one or two of these green changes．The goal here is to limit carbon dioxide and other greenhouse gases，which are closely associated the big problem of global—warming．
| Strategy l：Bring your own cup |
| You’ll get a l0一cent discount，and it’s one less paper cup to end up in a dustbin． The store won’t create more waste when they throw away a cup． |
| Strategy 2：Turn off your computer |
| When in standby mode，your PC is still using energy．Turning off a monitor for 40 hours a week may only save$5 a month，but it reduces C02 by 750 pounds． |
| Strategy 3：Reuse plastic bags |
| Instead of throwing away l00 billion plastic bags a year，try and get a second，third，or tenth use out of them．Better yet，next time you shop，try a reusable ba9．You’re reducing pollution The amount of oil it would take to make just l4 plastic bags would run your car for one mile． |
| Strategy 4：Use recycled paper in the bathroom |
| Most of the toilet paper we use is made from trees found in forests previously untouched by humans．If every household replaced one roll of toilet paper with a recycled one，424,000 trees would still be standin9．Look for copper towels too． |
| Strategy 5：Buy energy—efficient appliances（电器） |
| Replace the old fridge with an Energy Star appliance and you’ll use l5 percent less energy．It might be a little expensive to buy，but you’ll save money on your electricity bills and help the environment．If we all used one Energy Star appliance at home．it would be like plantin9 1.7 million acres of new trees． |
1．What is the best title for the passage?
A．Strategies to Save Money
B．Ways to be Earth—Friendly
C．Strategies to End Global-Warming
D．Ways to Limit Carbon Dioxide
2．According to the writer，what will happen if our PC is switched off when not in use?
A．It will help．to reduce a great deal of CO2．
B．It will help to save a large amount of money．
C．It will save the amount of oil that runs your car for a mile．
D．It will be like plantin9 1．7 million acres of new trees．
3．Which strategies suggest recycling or reuse of things?
A．Strategies l＆3． B．Strategies 2&5．
C．Strategies 3&4． D．Strategies 4&5．
4．What benefits do these strategies have in common?
A．They all help reduce the use of energy．
B．They all cut down the amount of the use of paper．
C．They all result in producing less greenhouse gases．
D．They all aid to preserve our trees and forest．
5．How many pounds of carbon dioxide does the monitor give off in an hour?
A．5 pounds． B．150 pounds．
C．8 pounds． D．18．75 pounds．
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