______ money，it remains to see whether we can put the idea into practice.

Even if we have an extremely healthy diet and lifestyle, the human body is programmed to wear out at a maximum of about 120 years, and usually less. We all have a biological clock inside us which determines the moment when our organs cease to function properly. This is because our cells have stopped renewing themselves and our body can no longer repair itself. This is also the moment when we are more likely to begin to suffer from the diseases of old age such as arthritis and Alzheimer’s. However, rapid advances in DNA research are beginning to throw light on the secrets of the ageing process. By the end of this century we could literally have the power of life over death.
Although it has long been accepted that humans have a fixed lifespan, it is also a fact that certain other organisms, such as reptiles and amphibians, appear to live indefinitely. The only reason we do not see 500-year-old alligators is because in the wild their lives are always in danger, from man, from pollution and from other animals. When they are kept in zoos they do not seem to age at all after they are fully grown. The same is true of some species of fish, which grow indefinitely and show no signs of ageing. The existence of animals with no fixed lifespan seems to indicate that an age gene really does exist. It is this gene which scientists are searching for, which may delay or repair damage to the body caused by ageing.
Another new area of research involves the oxidation（氧化） theory, which says that ageing is caused by the same process that makes iron rust. In controlled experiments, the lifespans of certain animals were shown to be lengthened with anti-oxidants; for example, the lifespan of mice can be increased by 30%. Antioxidants are already being used in face creams and other cosmetics, and they are likely to play an important part in keeping people physically young.
Perhaps the most immediate advance we are likely to see in the battle to halt（停止）the ageing process will be organ replacement. By the year 2020 it is likely that we will be replacing injured bones or even organs like livers and kidneys with ones “grown” in laboratories. By 2050 perhaps every organ in the body, except the brain, will have become commercially available. Recent experiments also show that it may one day be possible to “grow” new organs inside our body to replace worn-out ones, something which lizards and alligators already do.
Suddenly immortality（不死，不朽） seems within reach. We can begin to imagine a future where we are born, we grow to maturity, but we never grow old and die. But do we really want to live forever?
【小题1】 When all humans reach a certain age,         .

_____ money，it remains to be seen whether we can put the idea into practice.

A．Lacking  B．Lacked  C．To lack  D．Having lacked

Cancer is among the top killer diseases in our society today and scientists have found out that stress(紧张) helps to bring it on. It is worthwhile to consider, therefore, what are the causes of stress in our life, and whether we can do anything about them.

Are we underemployed, or overburdened with too many responsibilities? Do we have a right balance of work and leisure(闲暇) in our lives? Are our relationships with family, friends or fellow workers all they should be?

All these things can be a cause of stress, and it is best to face them honestly, and bring our frustrations(沮丧，挫败) into the open. People who have a good row and then forget it are doing their health better than shoes who bottle up their feelings.

If our self-examination has brought any causes of stress to light, let us consider what we can do about them. It is possible to change jobs. We can make more leisure and fill it more happily, if we will accept a different living standard. We can improve our personal relationships by a different attitude. It is we who allow other people to make ourselves unhappy. Often the little things that disturb us are not worth an hour’s anger. The teaching in the Bible “Don’t let the sun go down upon your wrath(愤怒)” is good advice from the health point of view as well as the religions(宗教，信仰).

65. Which of the following statement is TRUE?

   A. Freedom from responsibilities helps relieve(减轻) stress.

   B. Stress is the direct cause of cancer.

   C. The cause of stress are worthy of serious study.

   D. Cancer is the number one killer in our society today.

66. According to the text, which of the following people is more likely to suffer from stress?

   A. People who have cancer.       

   B. People who like to quarrel with others.

   C. People whose living standard is low.

   D. People who have more responsibilities than they can handle.

67.The word “row” in the third paragraph most probably means          .

   A. a noisy quarrel                       B. a very loud noise

   C. a neat line of things side by side         D. a journey in a boat

68. Which of the following is NOT mentioned as a way to reduce our stress?

   A. Changing our jobs.

   B. Changing our attitude about little things that make us unhappy.

   C. Speaking out about our frustrations.

   D. Reading the Bible.

C DAD

______ money , it remains to be seen whether we can put the idea into practice.