He knew that he would be punished severely because of his serious error. Therefore he ______ away the day before yesterday.
 
【正确答案】 B
【答案解析】 动词词义辨析。句子的语境为:他知道自己的错误很严重,将会受到严惩,因此他前天就逃跑了。fled是flee的过去式,意思是“逃逸”,符合句意。而caution“警告”,chatter“喋喋不休地谈”,civilize“使文明”都与句意不符。故答案为B。