2.Aging Aging is the process of growing old.It occurs eventually in every living thing provided,of course.that an illness or accident does not kill it prematurely.The most familiar outward sign of aging may be seen in old people,such as the graying of the hair and the wrinkling of the skin. Signs of aging ina pet oss of playfuess and energy.an in hearing and eyesight,or even a sightyng coat Plants age oobut the signs are much harder Most body parts grow bigger and stronger,and function more efficiently during childhood. They reach their peak at the time of maturity,or early adulthood.After that they begin to decline. Bones,for example,gradually become lighter and more brittle.In the aged,the joints between the bones also becd rigid and mor e make mo ing more All the major organs of the body show signs of aging The brain,for xa mple,works les efficiently,and even gets smaller in size.Thing processes of all sorts are slowed down.Old people often have trouble in remembering recent events. One of the most serous changes of old age occurs in the arteries.the blood vessels that lead from the heart They hee the body. n accounts, for many of the of the aged may,for example,result in heart attac Aging is not a uniform process.Different parts of the body wear out at different rates.There are great differences among people in their rate of aging.Even the cells of the body differ in the thrity of cells are capable of reproducing themselves many times durg ifetime.Ne erve cells andm bres can never be ep nce Gerontologist -scientists who study the process of aging--believe the wearing out of the body is controlled by a built-in biological time-clock.They are trying to discover how this clock works so that they can slow down the process.This could give man a longer life and a great number of productive vears. (4.5minutes 375 words) 1.What is the main idea in the first paragraph? a Signs of aging are easier to detect in animals than in plants. b.Aging occurs in every living thing after it has reached maturity c.The outward sins of agin may be seen inod people d.Not all signs of aging are visible. 2.When the brain begins to age a.evesight will begin to decline too b.it becomes lighter. cthe thinking p s go on just as before 3."The arteries"refers to a.the paths along which blood flowsto all parts of the body b.the tubes carrying blood back to the heart 2. Aging Aging is the process of growing old. It occurs eventually in every living thing provided, of course, that an illness or accident does not kill it prematurely. The most familiar outward sign of aging may be seen in old people, such as the graying of the hair and the wrinkling of the skin. Signs of aging in a pet dog or cat include loss of playfulness and energy, a decline in hearing and eyesight, or even a slight graying of the coat. Plants age too, but the signs are much harder to detect. Most body parts grow bigger and stronger, and function more efficiently during childhood. They reach their peak at the time of maturity, or early adulthood. After that, they begin to decline. Bones, for example, gradually become lighter and more brittle. In the aged, the joints between the bones also become rigid and more inflexible. This can make moving more painful. All the major organs of the body show signs of aging. The brain, for example, works less efficiently, and even gets smaller in size. Thing processes of all sorts are slowed down. Old people often have trouble in remembering recent events. One of the most serous changes of old age occurs in the arteries, the blood vessels that lead from the heart. They become thickened and constricted, allowing less blood to flow to the rest of the body. This condition accounts, directly or indirectly, for many of the disease of the aged. It may, for example, result in heart attack. Aging is not a uniform process. Different parts of the body wear out at different rates. There are great differences among people in their rate of aging. Even the cells of the body differ in the way they age. The majority of cells are capable of reproducing themselves many times during the course of a lifetime. Nerve cells and muscle fibres can never be replaced once they wear out. Gerontologists---scientists who study the process of aging---believe the wearing out of the body is controlled by a built-in biological time-clock. They are trying to discover how this clock works so that they can slow down the process. This could give man a longer life and a great number of productive years. (4.5 minutes 375 words) 1. What is the main idea in the first paragraph? a. Signs of aging are easier to detect in animals than in plants. b. Aging occurs in every living thing after it has reached maturity. c. The outward signs of aging may be seen in old people. d. Not all signs of aging are visible. 2. When the brain begins to age_____. a. eyesight will begin to decline too. b. it becomes lighter. c. the thinking processes go on just as before. d. memorization declines. 3. “The arteries” refers to ____. a. the paths along which blood flows to all parts of the body b. the tubes carrying blood back to the heart