标题: 145 [打印本页] 作者: applemusic 时间: 2003-12-2 00:02 标题: 145 145. Astronomers at the Palomar Observatory have discovered a distant supernova explosion, one that they believe is a type previously unknown to science.（不明白） (A) that they believe is (B) that they believe it to be (C) they believe that it is of (D) they believe that is (E) they believe to be of 觉得1挺好的，分析不清楚结构 作者: yzlinlin 时间: 2003-12-2 01:56
就是OG 9。