阅读理解解题技巧进阶练习I. 阅读理解ADoes exercise strengthen your brain while it builds muscle?To learn more about how exercise affects the brain ， scientists in Ireland recently asked a group of sedentary（ 久坐的 ）male college students to take part in a memory test followed by strenuous（紧张的）exercise.First， the young men watched a rapid fire lineup of photos with the faces and names of strangers. After a break， they tried to recall the names they had just seen as the photos again moved quickly across a computer screen. Afterward ，half of the students rode a bicycle ，at an increasingly strenuous pace，until they were exhausted. The others sat quietly for 30 minutes. Then both groups took the brain-teaser test again.Notably, the exercised volunteers performed significantly better on the memory test than they had on their first try. while the volunteers who had rested did not improve.Meanwhile, blood samples taken throughout the experiment offered a biological explanation for the increase in memory among the exercisers. Immediately after the strenuous activity ，the cyclists had significantly higher levels of a protein known as BDNF ，which is to promote the health of nerve cells. The men who had sat quietly showed no comparable change in BDNF levels.For some time. scientists have believed that BDNF helps explain why mental functioning appears to improve with exercise. However ，they haven t fully understood which parts of the brain are affected or how those effects influence thinking. The Irish study suggests that the increases in BDNF caused by exercise may play a particular role in improving memory and recall.Other new studies have reached similar conclusions ，among both people and animals， young and old. In one interesting experiment published last month, Brazilian scientists found that after sedentary elderly rats ran for a mere five minutes or so several days a week for five weeks. an increase of biochemical processes appeared in the memory center of their brains ， resuming in increased production of BDNF there. The old ， exercised animals then performedalmost as well as much youn ger rats oil memory tests.1. The brain-teaser test shows thatA. a good rest can improve ones memoryB. too much exercise can slow dow n ones memoryC. exercise can improve one s memoryD. cyclists usually have better memory2. What is the function of the BDNF?A. To in crease the nu mber of brain cells.B. To remi nd people of what is likely to be forgotte n.C. To draw one s attention to what is seen.D. To motivate the brai n and refresh one s memory.3. The sede ntary elderly ratsafter five weeks of running.A. got worn out in the endB. performed better in rememberi ng thingsC. reduced the amount of BDNFD. stopped biochemical process in the brain4. The best title for the passage might beA. How Exercise Ben efits the BrainB. Too Much Exercise Harms the BrainC. Experiments on the BrainD. Exercise Helps One Stay YoungYesterday was my stepmom s birthday. I hadnt been home for a longtednte stopwaby the house to see her on this special day.I have been struggling financially so I was afraid of the long trip. Gas is so expensive no wadays! Any way, I filled my tank with gas and set off 。I stopped at the shopping mall and found a present. It was the perfect gift and I knew she would love it. But whe n I got to the cashier my card was decli ned! I did not have eno ugh money in my acco unt to pay for the gift!So I pondered the issue for a few minutes. I could put it back and get something cheaper,but I knew there was nothing else in the store she would like as much. So, I got on my smart-phone and transferred some money from my savings account so I was able to pay for the gift. It took a big chunk of my savings but I wanted her to have something special. She loved the gift and I felt that even though I had spent almost all my money my stepmom deserved the best and I was glad I gave her the best that I could.Before leaving my parents house, my dad took me to one side aonudr, sweitchrethand-shake, he gave me some money. I had not said anything to him about my finances but I guess my dad had just known it. When I got to the car, I saw the amount he gave me was three times what I had spent on the gas and the gift!It goes to show that doing the right thing always comes with great rewards.1. Why was the writer unwilling to have a long trip ？A. Because gas was hardly available.B. Because the writer was short of money.C. Because the writer didn t like driving.D. Because the road was difficult to drive on.2. The underlined word “ pondered ” in Para. 4 means .A. thought aboutB. tried onC. depended onD. got through3. From the passage, we can infer that .A. the writer loves his/her stepmom very muchB. the gift the write