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B．a lack of exercise when very young
C．social problems
D．difficult relationships with teachers
Learning disabilities are very common. They affect perhaps 10 percent of all children. Four times as many boys as girls have learning disabilities.
Since about 1970, new research has helped brain scientists understand these problems better. Scientists now know there are many different kinds of learning disabilities and that they are caused by many different things. There is no longer any question that all learning disabilities result from differences in the way the train is organized.
You cannot look at a child and tell if he or she has a learning disability. There is no outward sign of the disorder. So some researchers began looking at the brain itself to learn what might be wrong.
In one study, researchers examined the brain of a learning-disabled person who had died in an accident. They found two unusual things. One involved cells in the left side of the brain, which control language. These cells normally are white. In the learning disabled person, however, these cells were gray. The researchers also found that many of the nerve cells were not in a line the way they should have been. The nerve cells were mixed together.
The study was carried out under the guidance of Norman Geschwind, an early expert on learning disabilities. Doctor Geschwind proposed that learning disabilities resulted mainly from problems in the left side of the brain. He velieved this side of the brain failed to develop normally. Probably, he said, nerve cells there did not conncts as they should. So the brain was like an electrical device in which the wires were crossed.
Other researchers did not examine brain tissue. Instead, they measured the brain’s electrical activity and made a map of the electrical signals.
Frank Dully experimented with this technique at Children’S Hospital Medical Centre in Boston. Doctor Dully found large differences in the brain activity of normal children and those with reading problems. The differences appeared throughout the brain. Doctor Duffy said his research is evidence that disabilities involve damage to a wide area of the brain, not just the left side.
第41题 Which of the following is NOT mentioned in the passage?____________.
A Learning disabilities may result from the unknown area of the train
B learning disabilities may result from damage to a wide area of the train
C Learning disabilities may result from abnormal organization of the train cells.
D Leaning disabilities may result from problems in the left side of the brain.
| 完形填空。 | |||
| True forgiveness is one of the most remarkable qualities a human can possess! In the fighting between two countries in the 1970s, a young man was walking from one village to the next when he was1by an armedguerrilla(游击队) fighter from the enemy country. The fighter 2the young man down the hill where he was to be3. But a (n)4thing happened. The young man, who had5military(军事的) training, was able todisarm(解除武装) the fighter. Now, the table was6, and it was the fighter who was ordered down the hill. As they walked,7, the young man began to reflect on what was happening. Recalling the8of his mother, "Love your enemies; do good to those who9you." he found he could go no further. He 10the gun into the bushes, told the fighter he was11to go and turned back12the hill. Minutes later, he heard footsteps13behind him as he walked. "Is this the end after all？" he14. Perhaps the fighter had got the gun and wanted to finish him off. But he continued on,15glancing back, until his enemy reached him, only to grab him in a hug and pour out16for sparing his life. Mercy often wears the face of17. And though it usually isn't an enemy in uniform that we are challenged to forgive, we hav18for mercy every day. Family members and friends, co-workers and neighbors and even strangers have19for our forgiveness. You know who they are. As Mahatma Gandhi said, "The20can never forgive. Forgiveness is the attribute (特性) of the strong." Be strong. Forgive. | |||
| ( )1. A. shot ( )2. A. demanded ( )3. A. beaten ( )4. A. amazing ( )5. A. watched ( )6. A. turned ( )7. A. thus ( )8. A. expressions ( )9. A. forgive ( )10. A. packed ( )11. A. free ( )12. A. for ( )13. A. showing ( )14. A. shouted ( )15. A. seldom ( )16. A. marks ( )17. A. awareness ( )18. A. opportunities ( )19. A. need ( )20. A. lonely | B. murdered B. reminded B. shot B. frightening B. received B. covered B. indeed B. plans B. hate B. dragged B. slow B. into B. waving B. counted B. never B. favors B. kindness B. explanations B. responsibility B. weak | C. killed C. ordered C. accepted C. inspiring C. accepted C. moved C. therefore C. words C. instruct C. forced C. nervous C. up C. running C. wondered C. always C. thanks C. safeness C. hopes C. patience C. healthy | D. caught D. required D. driven D. confusing D. suggested D. repaired D. however D. signals D. help D. threw D. eager D. down D. jumping D. argued D. sometimes D. reasons D. forgiveness D. lessons D. energy D. calm |
B．had he arrived
C．he arrived
D．he had arrived
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