70. We can know from the passage that ______.

　　 A. the reason why ageing takes a greater loss on the male heart has been found out

　　 B. scientists are on the way to finding out why the male heart loses more of the cells

　　 C. the team has done something to prevent the male from suffering the greater loss

　　 D. women over 70 could lose more heart cells than those at the age of 20

E

A person has two hands, two legs and two eyes, but it is only at first sight that a human being is symmetric (对称的). Firstly, we have a leading hand, the right one for the majority of people. Secondly, we have a leading eye. It has been found that the right eye is the leading one for about two thirds of all people, and the left one for one third of all people. The experiment involved only right-handed students. Some of them had a right leading eye, and the others had a left leading eye. All of the subjects in this experiment were asked to read a passage on the computer screen, the passage being placed either in the right or in the left part of the screen. It turned out that the “left-eyed” subjects read the text quicker when it was placed on the left, than when the passage was placed on the right. As for the “right-eyed” individuals, no such differences were noticed with them.

More detailed analysis has since proved that when the “left-eyed” people were reading the left-side text, the brain perceived more symbols than in case of reading the right-hand text. This is directly connected with the speed of reading as the more symbols a glance perceives, the quicker a person reads. There is one more sign of the successful execution of reading: in the course of reading, the reader’s glance periodically(周期性的) returns back to words already read. Thus, in the left-sided text, the “left-eyed” subjects made fewer returns than they did in the right-sided text, which meant they were more successful in recognizing “left” text than “right” text. In addition to this, the majority of the “left-eyed” persons performed faster quick eye movements to the left than to the right.

It allows designers to take the leading eye into account when producing various kinds of video-products.

69. If you want to live longer, you should ______.

　　 A. enable your heart to beat much faster

　　 B. find out the reason for ageing

　　 C. exercise regularly to keep your heart healthy

　　 D. prevent your cells from being lost

68. The passage mainly tells of _______.

　　 A. men’s heart cells　 　　　　　　　　　　　　　　　　　　　 B. women’s ageing process

　　 C. the gender difference　　　　　　　　　　　　　　　　　　 D. hearts and long life

67. The underlined word “longevity” in the second paragraph probably refers to _______.

　　 A. health　　 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 B. long life　　　

　　 C. ageing　　　 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 D. effect

66. What lesson does the writer learn from the race?

　　 A. Women are as good as men in sports.

　　 B. Women are better at climbing hills.

　　 C. He should have more training in a cross-country race.

　　 D. He should set a quicker pace at the beginning of a race.

D

Why do men die earlier than women? The latest research makes it known that the reason could be that men’s hearts go into rapid decline when they reach middle age.

The largest study of the effects of ageing on the heart has found that women’s longevity may be linked to the fact that their hearts do not lose their pumping power with age.

“We have found that the power of the male heart falls by 20-25 percent between 18 and 70 years of age,” said the head of the study, David Goldspink of Liverpool John Moores University in the UK.

“Within the heart there are millions of cells that enable it to beat. Between the age of 20 and 70, one-third of those cells die and are not replaced in men,” said Goldspink. “This is part of the ageing process.”

What surprises scientists is that the female heart sees very little loss of these cells. A healthy 70-year-old woman’s heart could perform almost as well as a 20-year-old one’s.

“This gender difference might just explain why women live longer than men,” said Goldspink.

They studied more than 250 healthy men and women between the ages of 18 and 80, focusing on healthy persons to remove the confusing influence of disease.

The team has yet to find why ageing takes a greater loss on the male heart, said Goldspink.

The good news is that men can improve the health of their heart with regular exercise. Goldspink stressed that women also need regular exercise to prevent their leg muscles becoming smaller and weaker as they age.

65. By saying “a long, punishing hill” (paragraph 5), the writer implies that ______.

　　 A. Peggy would fail to reach the hilltop　

　　 B. men are more skilled at climbing hills

　　 C. overtaking Peggy would be easy

　　 D. climbing the hill would be a demanding task

63. What did the writer think of the race in the beginning?

　　 A. It would be hard work.

　　 B. It would be an easy race.

　　 C. It would be a test of his strength.

　　 D. It would be a good learning experience.

64 What worried the writer when Peggy greeted the young runner?

　　 A. Peggy overtook the young runner.

　　 B. Peggy was running energetically.

　　 C. Peggy was laughing at the writer.

　　 D. Peggy paid no attention to the writer.

62. What did the doctor mean when he said “The genie is out of the bottle”?

　　 A. A lot of bad things will be copied with the development of the clone technology.

　　 B. The development of the clone technology will bring harm to the human world.

　　 C. The development of the clone technology will bring good to the human world.

　　 D. He just made a joke about Dolly the Sheep.

C

It was an early September day, cool and bright and just right for running, and I was in the first few miles of a 10-mile race over a course with a few high hills. Still, I felt energetic; despite the hills it was going to be a fine run.

Just ahead of me was Peggy Mimno, a teacher from Mount Kiseo, New York. She was also running easily, moving along at my speed. The pace felt comfortable, so I decided to stay where I was; Why pay attention to pace when she was setting such a nice one? I’d overtake (追上) her later on when she was tired.

So I ran behind her. The course headed north for miles, wandered west for a hilly mile, then turned south again along a winding road. The race was getting harder. We had four miles left and already it was beginning to be real work.

Peggy overtook a young runner. She seemed to know him, for they exchanged a few cheerful words as she passed him. Their exchange worried me. You don’t chat during a race unless you are feeling good, and Peggy simply was.

Still, I was close enough to overtake her if she was tired, so I didn’t give up hope completely. We were getting nearer to a long, punishing hill now and it would be the test. We were a mile from the finish line, so whatever happened on the hill would almost determine who crossed it first.

As I moved up the hill, my attention wandered for a few minutes. When I looked up, Peggy was moving away -first five yards, then ten, then more. Finally it was clear that there was no hope of catching her. She beat me soundly.

There is an important lesson in that race. Women are thought to be weaker, slower and not nearly as skilled in sports. Yet as Peggy Mimno so clearly showed, the similarities between men and women runners are more important than differeces. I have run with a number of women, and I can say it is often hard work.

61. We can learn from the passage that ______.

　　 A. most European countries forbid carrying out the research on human cloning

　　 B. Dr. Panayiotis Zavos is a native American

　　 C. a single man will soon have the ability to have a biological child of his own

　　 D. nobody supports Dr. Zavos’ project

60. According to Dr. Zavos, ____.

　　 A. it will take only three or four months to clone a human being

　　 B. human cloning could only produce a copy from a living person

　　 C. it is not dangerous to clone a human

　　 D. they would not clone famous people like Bin Laden and Michael Jordan