题目内容
The Discovery of Anesthetic
Robert Liston used an anesthetic(麻醉剂)in all operation in London during which he cut off a leg in 26 seconds．There was not a sound from the sick man．and when he came to his senses he asked．“When are you going to begin?”What a change this was from the operations in earlier days!Simpson heard of it．hurried to London，and brought some ether(醚)back to Edinburgh．There he used it himself．But ether was not a perfect anesthetic．It had a bad smell，and its results on the sick man after the operation were unpleasant．Simpson decided to try to find a better anesthetic．
He had his two friends．Duncan and Keith．then sat night after 
night in Simpson’s sitting room．and tried one gas after another on them―selves．This was not very safe，and it was a good thing that they some―times tried a new gas on an animal first．Once Simpson was just going to try a new gas himself．when he was told that he ought to try it first on an animal．He did so，and the animal died．
After about a year's work of this．the three men tried a new anesthetic called chloroform(氯仿)．Suddenly Simpson fell on the floor under the table．When he cam．e back to his senses．the first thought in his
mind was that chloroform was very good．Next he noticed that he was lying on the floor．Then he heard a noise and turned his head：there was Doctor Duncan under a chair with his eyes and mouth wide open，but asleep．Then Simpson saw Doctor Keith’s leg and feet moving about．
68．Simpson tried to find a better anesthetic because ．
A．ether had little effect on the sick man
B．ether smelled sour
C．ether was not an ideal anesthetic
D．the sick man after the operation was not pleased
69．According to the author，the safest way to try a new anesthetic was to try ．
A．on scientists themselves first
B．on an animal first
C．on sick persons first
D．on men and animals at the same time
70．Simpson and his two friends tried a new anesthetic called chloroform，and of them died．
A．all B．two C．none D．one
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