[求助]大全145

freedownload

1.                             Astronomers at the Palomar Observatory have discovered a distant supernova explosion, one that they believe is a type previously unknown to science.

(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）

(E) they believe to be of

C选项是语法上有错呢，还是只是不如E简洁，谢谢！

philikittist

如果选C,只能理解为C是one的定语从句，并省略了关系代词。即;


one (which) they believe that it is of a type ~~~~


这个关系代词必须在从句中担当一定成分，但C的从句十分完整，无关系代词落脚之地。