2. 外语
  3. As one ages, the hairs on the head also age. In fact, just about everything on the human body begins toshow signs of wear and te

As one ages, the hairs on the head also age. In fact, just about everything on the human body begins toshow signs of wear and te

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问题     As one ages, the hairs on the head also age. In fact, just about everything on the human body begins toshow signs of wear and tear after a while. The【B1】______ wear and become stiff and skin wears andbecomes wrinkled. Hairs on the head grow and eventually die. They are replaced, but in the process something else happens. When new hairs are replaced, the color or pigment(色素)【B2】______them too. However, as one ages, this pigment becomes less and less【B3】______. At first, hairs will have a limited amount ofpigment and they will【B4】______ to be grayish in color. In time, they will lose all of their pigment and willbe white. Many things are known to cause graying, and genetics is a very【B5】______factor. If one of yourparents turns gray at an early age, there is a good chance that you will too. Some people begin the graying process in high school, while others may be over the age of forty. Constant worry and tension can have manydetrimental【B6】______on the human body. It is a known fact that stressful times can cause one to sufferhair loss. It would【B7】______ that if it, can cause these problems, perhaps it also may【B8】______ graying. However, there is no sound evidence to【B9】______ this. On the other hand, many medical【B10】______believe that there may be a link between graying and a constant state of anxiety or tension.
【B3】
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答案available
解析 由空格前的becomes less and less可以推断出，空格处应填入一个形容词。结合录音可知，答案是available，意为“可以得到的”。
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大学英语四级

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