C
Can you imagine a catfish bigger than a boy? There are more than 1，000 kinds of catfish；28 species are found in the United States' lakes and rivers． This huge family has some mighty strange members. Let's meet a few.
Walking catfish．Nature's feisty little catfish，found in southern Florida，has an extra lung for breathing on dry land. When its swimming hole dries up，the walking catfish waddles on stiff forward fins in search of another lake or stream．If an enemy attacks，the fish flares（展开）its top and front fins and leaps at the attacker to scare it off．
Armored catfish．This catfish has heavy，bony plates protecting its body. The shell makes the fish difficult to bone. To cook it，throw the fish whole into a fire. When it is done，break it open for eating．Some armored catfish are found in Florida，but the 100-pounders live in South America．
Rounding out the family of strange catfish are talking catfish，which make growing sound when you pull them from the water；climbing catfish，which move quickly up shore brush in search of food；electric catfish，which can deliver a mild shock；and blind catfish，which settle in the inky blackness of underwater caves．Blind catfish find food through taste buds in their eight whiskers（须）．
Most catfish have four whiskers on the upper jaw and four on the lower jaw. Sensory holes on these whiskers help the fish smell and taste food even in the muddiest of water．The United States does not have catfish anywhere near the size of those in South America．But in some large U.S，rivers，blue and flathead catties do top 100 pounds．
Most of the catfish you are likely to catch will be much smaller，about frying pan size．When you catch one，remember that the top fins and the forward fins have poison glands（腺）at their bases. They can give you painful wounds （…）
63．The purpose of the passage is to___________．
A．encourage readers to go fishing for catfish
B．inform readers of the world's largest catfish
C．describe the unusual characteristics of catfish
D．explain different ways to catch a variety of catfish
64．The author talks about the way of cooking an armored catfish to show that
A．it has heavy and bony plates        B．it's hard to cook and eat
C．it has too many bones      D．it's poisonous inside
65．Which is NOT mentioned about catfish in the passage?
A．Its eating habits．                                    B．Its living conditions． 
C．Its whiskers．                                 D．Its size
66．What may be continued in the last paragraph?
A．The author's love for catfish．     B．Where else to catch a catfish．
C．The origin of the name “catfish”    D．The safest way to handle catfish

Medalists of the 1948 London Olympic Games look back on their summer of victory.
SAMMY Lee, 91, U.S.
GOLD AND BRONZE, DIVING
I first had my Olympic dream at 12, when they held the 1932 Olympics in Los Angeles. My father and I were at a grocery store, and I asked, “What are all the flags doing here?” He said, “We are having the Olympic Games. That’s where they honor the greatest athletes in the world.” I said, “Papa, someday I’m going to be an Olympic champ.”
Walking up the 10-meter platform, I thought to myself, “I’ve waited 16 years for this moment. Am I going to win?” So I prayed to God that I was most deserving of winning the Games.
DAVID BOND, 90, BRITAIN
GOLD, SAILING
During the war, I spent six years in Royal Air Force. I think in general, the 1948 Olympics meant very little to most people. We were too busy after the war to be worried about sport very much anyway.
Our team had about six weeks before the Olympics down at Torquay and we went out sailing every day.
Winning gold was quite something. It was nice to stand on the platform with lots of people cheering. We celebrated by going to a big dance.
MICHAEL LAPAGE, 88, BRITAIN
SILVER, ROWING
I started rowing when I was 14. I joined the navy in 1942. In 1945 the war came to an end and I started rowing again.
In 1948 we were still on rations (配给供应): 4 oz. of red meat a week. But the United States had all the meat they wanted. They were the favorites to win.
On the day of the final, we led the Americans at the start, but their stronger staying power took them through to win. There were no ribbons on the medals, so we just showed them round the family.
THOMAS GODWIN, 91, BRITAIN
BRONZE, CYCLING
At 14 I left school and got a job delivering groceries on a bicycle, which excited my interest in cycling. When the war broke out, I volunteered but was held back, so I continued riding.
After my team won our bronze medals, we went home just round the corner and had a sit-down and a chat and a laugh. It was a different world. Money was never, never thought about.
【小题1】 According to the passage, Sammy Lee ___________.

An important factor that plays a part in susceptibility （易受影响） to colds is age．A study done by the University of Michigan School of Public Health indicated the fact that seems to hold true for the general population．Babies are the group suffering most from colds, averaging more than six colds in their first years．Boys have more colds than girls up to age three．After the age of three, girls are more susceptible than boys, and teenage girls average three colds a year to boy's two．
The general frequency of colds continues to decline into adults．Elderly people who are in good health have as few as one or two colds annually．One exception is found among people in their twenties, especially women, who show a rise in cold infections（感染）, because people to this age group are most likely to have young children．Adults who delay having children until their thirties and forties experience the same sudden increase in cold infections．
The study also found that economics （经济状况） plays an important role．As income increases, the frequency at which colds are reported in the family decreases．Families with the lowest income suffer about a third more colds than families at the upper end．Lower income generally forces people to live in closer quarters than those typically occupied by wealthier people, and crowding increases the opportunities for the cold virus to travel from person to person．Low income may also influence diet．The degree to which poor nutrition affects susceptibility to colds is not yet clearly proved, but an inadequate diet is suspected of lowering resistance generally．
68. What factors cause people to catch colds easily?
A. Age and pregnancy．             B. Health and pregnancy．
C. Health and economics．                  D. Age and economics．www.k*s￥5&u.com
69. Why does the lowest income lead to the rapid spread of colds?
A. Because poor people can't afford to go to see a doctor．
B. Because balanced diet has definitely affected poor people．
C. Because people with the lowest income have limited living space．
D. Because cold virus don't have opportunities to travel in poor families．
70. How does the study prove that age plays a part in susceptibility to colds?
A. Using comparison．  B. Using graphs．
C. Using description．  D. Using argument．
71. What can you learn from the passage?
A. Families with the lowest income suffer less colds than rich families．
B. The general frequency of colds are likely to increase among the poor．
C. Women in their twenties are most likely to avoid cold infections．
D. The general frequency of colds continue to rise into the adults．

B
You're in a bit of a dilemma standing in front of the produce section of your local supermarket. In one hand, you're holding a conventionally grown Granny Smith apple.In your other hand, you have one that's been organically grown. Both apples are firm,shiny and green. Both provide vitamins and fiber, and both are free of fat, sodium and cholesterol.
The conventionally grown apple costs less and is a proven family favorite. But the organic apple has a label that says "USDA Organic". Does that mean it's better? Safer? More nutritious? Several differences between organic and non-organic foods exist. Become a better informed consumer for your next trip to the supermarket.
The word "organic" refers to the way farmers grow and process agricultural products, such as fruits, vegetables, grains, dairy products and meat. Organic farming practices are designed to encourage soil and water conservation and reduce pollution.Farmers who grow organic produce and meat don't use conventional methods to fertilize, control weeds or prevent livestock disease.
Here are other differences between conventional fanning and organic farming:

* Organic or not? Check the label.
The U.S. Department of Agriculture (USDA) has established an organic certification program that requires all organic foods to meet strict government standards. These standards regulate how such foods are grown, handled and processed.Any farmer or food manufacturer who labels and sells a product as organic must be USDA certified as meeting these standards. Only producers who sell less than $5,000 a year in organic foods are exempt (免除) from this certification.
If a food bears a USDA Organic label, it means it's produced and processed according to the USDA standards. The seal is voluntary, but many organic producers
use it.
46. The main purpose of the passage is_________.
A. to promote the sales of organic food
B. to inform people organic food is better for their health
C. to persuade people to become informed consumers
D. to compare conventional and organic foods
47. According to the passage, organic farming is intended to_________.
A. improve the quality of the soil and water
B. take the place of the traditional agriculture entirely
C. adopt eco-friendly methods to grow plants and feed animals
D. prevent livestock from getting disease more effectively
48. According to the passage, the conventionally grown apple_________.
A. costs less but tastes worse than an organic one
B. doesn't look the same as an organic one
C. has proven itself acceptable by the family
D. contains more fat, sodium and cholesterol
49. Which of the following methods belongs to organic farming?
A. Using chemicals to kill insects and prevent disease.
B. Using rotted plants as fertilizer to promote plant growth.
C. Using growth hormones to speed up animals' growth.
D. Using pests to reduce insects and disease.
50. From the passage we know the organic certification program________.
A. is not meant for all producers of produce
B. makes it compulsory to attach a USDA Organic label
C. sets restrictions on the sales of organic produce
D. requires all foods to satisfy the strict government standards

This year some twenty-three hundred teenagers（young people aged from 13 —19）from all over the world will spend about ten months in U. S. homes. They will attend U.S. schools, meet U.S. teenagers, and form impressions of the real America. At the same time, about thirteen hundred American teenagers will go to other countries to learn new languages and gain a new understanding of the rest of the world.
Here is a two-way student exchange in action. Fred, nineteen, spent last year in Germany with George’s family. In turn, George’s son Mike spent a year in Fred’s home in America.
Fred, a lively young man, knew little German when he arrived, but after two months’ study, the language began to come to him. The school was completely different from what he had expected — much harder. Students rose respectfully^① when the teacher entered the room. They took fourteen subjects instead of the six that are usual in the United States. There were almost no outside activities.
Family life, too, was different. The father’s word was law, and all activities were around the family rather than the individual. Fred found the food too simple at first. Also, he missed having a car.
“Back home, you pick up some friends in a car and go out and have a good time. In Germany, you walk, but you soon learn to like it.”
At the same time, in America, Mike, a friendly German boy, was also forming his idea. “I suppose I should criticize^② American schools,” he says. “It is far too easy by our level. But I have to say that I like it very much. In Germany we do nothing but study. Here we take part in many outside activities. I think that maybe your schools are better in training for citizens. There ought to be some middle ground between the two.”
Notes:
①    respectfully  adv. 尊敬地，谦恭地
②    criticize  vt. 批评，责备
Choose the best answers according to the above:

1. 1.

   This year       __ teenagers will take part in the exchange programme between America and other countries.

   1. A.
      twenty-three hundred
   2. B.
      thirteen hundred
   3. C.
      over three thousand
   4. D.
      less than two thousand
2. 2.

   The whole exchange programme is mainly to        __.

   1. A.
      help teenagers in other countries know the real America
   2. B.
      send students in America to travel in Germany
   3. C.
      let students learn something about other countries
   4. D.
      have teenagers learn new languages
3. 3.

   What is particular in America schools is that        __.

   1. A.
      there is some middle ground between the two teaching buildings.
   2. B.
      there are a lot of outside activities
   3. C.
      students usually take fourteen subjects in all
   4. D.
      students go outside to enjoy themselves in a car
4. 4.

   After experiencing the American school life, Mike thought        __.

   1. A.
      a better education should include something good from both American and Germany
   2. B.
      German schools trained students to be better citizens
   3. C.
      American schools were not as good as German schools
   4. D.
      the easy life in the American school was more helpful to students