" Pain," as Albert Schweitzer once said, " is a more terrible lord of mankind than even death itself. " Prolonged pain destroys

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问题    " Pain," as Albert Schweitzer once said, " is a more terrible lord of mankind than even death itself. " Prolonged pain destroys the quality of life. It can【C1】______the will to live, at times【C2】______people to suicide. The physical effects are equally【C3】______Severe, persistent pain can spoil sleep and appetite,【C4】______producing fatigue and reducing the availability of nutrients to organs. It may【C5】______delay recovery from illness or injury and, in weakened or elderly patients, may make the difference between life and death.
  【C6】______, there are some kinds of pain that existing treatments cannot ease.【C7】______doctors can do little in these cases is terribly distressing for everyone involved but is certainly【C8】______What seems less understandable is that many people suffer not because their discomfort is untreatable but because physicians are often reluctant to【C9】______morphine. Morphine is the safest, most effective painkiller known for constant, severe pain, but it is also【C10】______for some people.【C11】______, it is rarely prescribed.
   Indeed, concern over addiction has【C12】______many nations in Europe and elsewhere to ban 【C13】______any uses of morphine and related substances, including their medical applications. Even【C14】______morphine is a legal medical therapy, as it is in Great Britain and the U. S. , many doctors, afraid of turning patients into addicts,【C15】______amounts that are too small to control pain.
【C4】

选项 A、with
B、whereby
C、thereby
D、as

答案C

解析 本题考查连接词的词性和用法。A介词,随着;B关系副词,凭……,由此;C表目的连词,借以、从而、由此;D连接副词,当。本句的意思是,持续剧烈的疼痛会影响人们的睡眠和胃口,从而让人疲惫不堪并减少了身体各器官可吸收的营养物质。
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