145

applemusic · 发表于 2003-12-2 00:02:00

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

yzlinlin · 发表于 2003-12-2 01:56:00

就是OG 9。

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