As the prisoner had been ______from the outside world for twenty years, he had no idea what the outside world was like.A.cut offB.cut awayC.cut outD.cut short
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A解析这题考查词组辨析：cut off切断， cut away切掉，砍掉cut out剪切，cut short 剪短，句意是：因为这个囚犯和外界隔绝了20年，他不知道外面发生了什么。选A。