B
One night last February, a seventeen-year-old Duffy drove home along a winding road, he saw a strange light thrown against the tree. “I knew it wasn’t the moon”, he said. “I drive this road all the time and I notice little things out of place.”
Duffy stopped his car and got out to examine. Below him far down in the deep valley lay a broken car with its headlights on. Thirty minutes earlier, a man had driven off the edge of the road, which has no guardrail. His car fell and rolled end over end, landing on its top more than two hundred feet below.
Duffy rushed to call for help, then returned and got down to reach the injured driver. Snow covered the valley and the temperature was below freezing. After struggling back up the cliff, Duffy took off his jacket and shirt and wrapped the injured man in time, along with the blankets from his car.
Life-saving deeds are starting to become usual action for Duffy, the oldest of seven children. When he was 12, he saved his ten-year-old brother from drowning. Two years ago, his three-year-old sister ate rat poison, and Duffy cleaned out her mouth, make her drink milk to protect her stomach and called doctors.
“We have tried to teach the children good values, and it looks like we have got some reward for it.” His father says.
46. The strange light came from ________.
A. The bright moon.          B. Duffy’s car.
C. The broken car in the valley   D. an unknown place
47. The phrase” landing on its top” means the car lay_________.
A. on the top of the cliff    B. with its wheels upward 
C. with its head upward    D. on the road as usual
48. Duffy wrapped the man because_________.
A. he was badly injured    B. he had lost too much blood  
C. he had nothing on      D. it was too cold that day
49. From the above article, we can see Duffy has saved ________ at least.  
A. two     B. three     C. four      D. five
50. “We have tried to teach the children good values” may probably mean Duffy’s parents often tell their children_________.
A. to help people in danger         B. how to save people’s lives
C. to remember the value of the car     D. how to do business

Dou Kou, a Chinese boy, is called “the youngest writer in the world”. He has written three books till now. Dou Kou was born in Jiangsu in 1994. When he was 7 months old, his parents started working in over 30 different cities, such as Xi’an and Shenzhen. This kind of life gave him things to think and write about. When he was 9 months old, he could speak and at the age of one, he could say five to six hundred words. At three, he could look up words in the dictionary. At four, his father taught him how to learn by himself. His parents like reading very much. So does he. At the age of 5, he began writing fairy tales. At the age of 6, he wrote a novel about his life in different cities with his parents. His fairy tales are all from his life. One day, he found many mice in the house. They only ate their food but also hurt his mother’s hand. So he thought, “If we give mice the stomach of cows, they will eat grass and they will be helpful to people.” This was his first fairy tales Change Stomach for Mice. Now he studies well in a middle school. He has written his third book, the novel called Eyes of Children. He says, “I am not different from other children. I just wrote several books.
【小题1】How many books has Dou Kou written?

DNA is one of the most important discoveries in science. DNA is the plan for the human being, as a blueprint is the plan for a building. DNA makes a person look the way he does. A person’s DNA comes from a mixing of his parents’ DNA. That’s why a child looks like his parents. But, besides controlling things such as height and hair color, DNA can also give people diseases. Scientists are now studying DNA to cure diseases.
In the seventies, scientists developed a process called recombinant or RDNA. Although it sounds difficult to understand, RDNA simply means taking DNA from one animal or plant and putting it into another. By doing so, scientists can create new beings. In doing so, scientists can better understand DNA, especially what parts of DNA do what. After they understand DNA, scientists can begin to cure diseases. Often, the new being created will itself be the cure.   Besides curing diseases, RDNA research can also do other things. For example, scientists in Japan have already created “super-trees”. Trees help humans, because they take CO₂, which poisons humans, from the air and turns it into oxygen, which lets humans breathe. “Super-trees” do this too, but do it much faster. As things such as cars and factories have already put much CO₂ in the area, “super-trees” are badly needed.
Unfortunately, there is a serious danger in RDNA research. Scientists want to create animals to cure old diseases, but these new animals may also create new diseases. It will be a serious problem if the animals escape from the science laboratory and into nature. As these animals are not natural, they may let loose many new powerful diseases.
As a result, RDNA research will create many solutions, but it will also create many problems.
【小题1】 From the passage, we can know that a boy looks like his parents because______.