In1863thefirstunde的精选

问题详情：  阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。   In1863thefirstundergroundpassengerrailwayintheworldopenedinLondon.Itranforjustundersevenkilometersandallowedpeopletoavoid...