题目

---Hey! Everyone in the office was at the dinner party in honor of Mr. Charles except you. What happened? ---I ______ after Mike, my colleague. He was badly ill. A. have looked      B. was looking       C. would look   D. had looked 答案：B 解析: 略马克思曾经预言：“蒸汽机在前一个世纪中翻转了整个世界，现在它的统治已到末日，另外一种更大无比的革命力量——电力的火花将取而代之。”人类开始进入“电气时代”是在 A.19世纪初期      B.19世纪晚期      C.20世纪初期      D.20世纪中期