For many years, scientists couldn't figure out how atoms and molecules on the Earth combined to make living things. Plants, fish, dinosaurs, and people are made of atoms and molecules, but they are put together in a more complicated way than the molecules in the primitive ocean. What's more, living things have energy and can reproduce, while the chemicals on the Earth 4 billion years ago were lifeless.
　　After years of study, scientists figured out that living things, including human bodies, are basically made of amino acids and nucleotide bases. These are molecules with millions of hydrogen, carbon, nitrogen, and oxygen atoms. How could such complicated molecules have been formed in the primitive soup? Scientists were stumped.
　　Then, in 1953, two scientists named Harold Urey and Stanley L. Miller did a very simple experiment to find out what had happened on the Primitive Earth. They set up some tubes and bottles in a closed loop, and put in some of the same gases that were present in the atmosphere 4 billion years ago: water vapor, ammonia, carbon dioxide, methane, and hydrogen.
　　Then they shot an electric spark through the gases to simulate bolts of lightning on the ancient Earth, circulated the gases through some water, sent them back for more sparks, and so on. After seven days, the water that the gases had been bubbling through had turned brown. Some new chemicals were dissolved in it. When Miller and Urey analyzed the liquid, they found that it contained amino acids-the very kind of molecules found in all living things.
61. When did scientists come to realize how the atoms and molecules on the Earth combined to make living thing?
　　A. 4 billion years ago. B.1953.　C. After seven days.D. Many years later.
62. Scientists figured out that human bodies are basically made of .
A.amino acids
B.molecules
C. hydrogen, carbon, nitrogen and oxygen atoms
D. water vapor, ammonia, carbon dioxide, methane and hydrogen
63. Harold Urey and Stanley L.Miller did their experiment in order to .　
A. find out what had happened on the Earth 4 billion years ago
　　 B.simulate bolts of lightning on the ancient Earth
　　 C. dissolve some new chemicals
　　D.analyze a liquid
64. At the end of the last paragraph, the underlined word "it" refers to .
A. a closed loop   B. an electric spark   C.water   D. the liquid
65. According to the writer, living things on the Earth include .
　A. atoms and molecules                     B.chemicals　
C. plants, fish, dinosaurs and human beings     D.the primitive soup

A few years ago, I was with a close woman friend in a grocery store in California．As we walked along the aisle (过道), we saw a mother with a small boy moving in the opposite direction and met us head-on (正面的) in each aisle．The woman barely noticed us because she was so angry with her little boy, who wanted to pull items off the lower shelves．As the mother became more and more annoyed, she started to yell at the child and several aisles later had progressed to shaking him by the arm．k+s-5#u 

At this point my friend spoke up．A wonderful mother of three and founder of a progressive school, she had probably never once in her life treated any child so harshly(严厉地)．I expected my friend would give this woman a solid mother-to-mother talk about controlling herself and about the effect this behavior has on a child．Instead, my friend said, “What a beautiful little boy．How old is he?” The woman answered cautiously, “He’s three．” My friend went on to comment on how curious he seemed and how her own three children were just like him in the grocery store, pulling things off shelves, so interested in all the wonderful colors and packages．“He seems so bright and intelligent,” my friend said．

The woman had the boy in her arms by now and a shy smile came upon her face．Gently brushing his hair out of his eyes, she said, “Yes, he’s very smart and curious, but sometimes he wears me out．” My friend responded sympathetically(表示同情地), “Yes, they can do that; they are so full of energy．”

As we walked away, I heard the mother speaking kindly to the boy about getting home and cooking his dinner．“We’ll have your favorite — macaroni(通心面) and cheese,” she told him．

The mother was angry with her baby because 　  　　．

A．the mother was very tired k+s-5#u 

B．the baby asked for more things

C．the baby ran madly in the store

D．the baby was pulling the goods off the shelves

We can learn from the passage that the author’s friend 　　   　．

A．treated her children well only     

B．was probably good to any child

C．liked the boy very much         

D．always wanted to help others

The author’s friend talked with the mother in that way to 　  　　．

A．show her sympathy for the woman

B．know something about the boy first

C．show her anger with the woman k+s-5#u 

D．make the woman realize children’s natural quality

With the story, the author most probably intends to tell us that 　　　  ．

A．we should respect a child’s nature

B．we should never blame a child

C．mothers usually share the same interest

D．mothers should try to be gentle and polite k+s-5#u 

C
　Being considered a leader in our society is indeed of high praise. Leadership means power, commands, respect and, most important, encourages achievement. Unlike vitamin C, leadership skills can’t be easily swallowed down. They must be carefully cultivated.
　Different from popular belief, most good leaders are made, not born. They learn their skills in their everyday lives. But which do they develop？How do they (and how can you) get others to follow?
　Always give credit. Many leaders note that the most efficient way to get a good performance from others is to treat them like heroes. Giving public credit to someone who has earned it is the best leadership technique in the world. It is also an act of generosity (慷慨) that’s never forgotten.
　Giving credit is more effective than even the most constructive criticism (批评), which often hurts rather than helps. Kenneth Blanchard, the author of The One-Minute Manager, agrees. “Catch people doing something right!” he says. Then tell everyone about it.
　Take informed risks. “The best leaders know that taking a risk is not a thoughtless exercise,” says management adviser Marilyn Machlowitz. “Sky divers don’t go up in an airplane without checking the parachutes (降落伞) beforehand.”
　Because the idea of risk also carries with it the possibility of failure, many of us usually wait for others to take charge. But if you want to be a leader, you must learn to fail and not die a thousand deaths. Pick yourself up and start all over again.
　Encourage enthusiasm (热情). “When people understand the important of work, they lend their mental strengths,” says Lee Ducat. But when they get excited about the work, all their energy gets poured into the job. That’s a great force! Is this the best way to create excitement? Be enthusiastic yourself. You will be followed by everyone.
64．The underlined word “cultivated” (in paragraph1) roughly means ________.
A．encouraged　　　　B．compared　　 C．examined　　　　D．developed
65．The part “always give credit” tells us that a leader should _______.
A．give helpful criticism　　　　　　　     B．regard others as real heroes
C．praise people for their good performances　  D．praise everyone
66．To be a good leader, you should _______.
A．not be afraid of any risks　　　　　　     B．think twice before taking risks
C．try to avoid any possible failures　　　　    D．know what a thoughtless exercise is
67．Which of the following can be the best title for the passage?
A．Leadership is of skills and techniques　　     B．Leadership is very important
C．Not many can be leaders　　　　　　     D．How to be a leader

Holding a cell phone against your ear or stalling it in your pocket may be hazardous to your health．
This paraphrases a warning that cell phone; manufacturers include in the small print that is often tossed aside when a new phone is purchased．Apple, for example, doesn’t want iP hones to come closer to you than 1．5 centimeters; Research In Motion, Blackberry’s manufacturer, recommends 2.5 centimeters．
If health issues arise from cell phone use, the implications are huge．Voice calls - Americans chat on cell phones 2．26 trillion minutes annually - generate $109 billion for the wireless carriers．
Devra Davis, an epidemiologist who has worked for the University of Pittsburgh, has published a book about cell phone radiation, "Disconnect." The book surveys scientific research and concludes the question is not settled.
　　Brain cancer is a concern that Ms. Davis examines. Over all, there has not been an increase in its incidence since cell phones arrived. But the average masks an increase in brain cancer in the 20-to-29 age group and a drop for the older population.
　　"Most cancers have multiple causes," she says, but she points to laboratory research that suggests low-energy radiation could damage cells that could possibly lead to cancer.
　　Children are more vulnerable to radiation than adults, Ms. Davis and other scientists point out. Radiation that penetrates only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid. No studies have yet been completed on cell phone radiation and children, she says.
　　Henry Lai, a research professor in the bioengineering department at the University of Washington, began laboratory radiation studies in 1980 and found that rats exposed to radiofrequency radiation had damaged DNA in their brains.
　　Ms. Davis recommends using wired headsets or the phone’s speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the abdomen.
【小题1】We can infer from the passage that________．