标题: 新prep SC1-173--查了下没有讨论这题的贴 [打印本页] 作者: zengshiyu 时间: 2009-11-19 09:53 标题: 新prep SC1-173--查了下没有讨论这题的贴 The widely accepted big-bang theory holds that the universe began in an explosive instant 10 to 20 billion years ago and has been expanding ever since.
A. that the universe began in an explosive instant 10 to 20 billion years ago and has been expanding
B. that the universe had begun in an explosive instant 10 to 20 billion years ago and had been expanding
C. that the beginning of the universe was an explosive instant 10 to 20 billion years ago that has expanded
D. the beginning of the universe to have been an explosive instant 10 to 20 billion years ago that is expanding
E. the universe to have begun in an explosive instant 10 to 20 billion years ago and has been expanding