单选题
Read the following passage and choose the best word for each space. The need for a surgical operation,【C1】______an emergency operation, almost always comes as a【C2】______shock to the patient and his family. Despite modern advances, most people still have an【C3】______fear of hospitals. Patients do not often believe they really need surgery — cutting into a part of the body as【C4】______to treatment with drugs. In the early years of this century there was【C5】______specialization in surgery. A good surgeon was capable【C6】______almost every operation that had been【C7】______up to that time. Today the【C8】______is different. Operations are now being carried【C9】______that were not even dreamed of fifty years ago. The heart can be safely opened. A lung, the whole stomach, or even part of the brain can be removed and still permit the patient to live a【C10】______and satisfactory life. The【C11】______of surgery has increase【C12】______in this century. Its safety has increase, too. Deaths from most operations are about 20% of what they were in 1910 and surgery has been extended【C13】______many directions. The hospital stay after surgery has been【C14】______to as little as a week for most major operations. Most patients are out of bed on the day after their operation【C15】______may be back at work in two or three weeks. Many developments in modern surgery are almost【C16】______. One of the most revolutionary areas of modern surgery is【C17】______of organ transplants. It has been discovered that with the use of X-rays and special drugs, it is possible to transplant【C18】______from one person to another which will【C19】______for periods of a year or more. Heart and lung transplants have been reasonably successful in animals,【C20】______rejection problems in humans have yet to be solved.