求助牛人一题

zhjie

9. 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)    they believe to be of
我知道答案选E，就是不清楚that为什么错了，是因为one所以不能用that在后面接吗？为什么啊？the one 后面接that是不是就可以？
如果可以的话能解释一下所有选项就更好啦～拜托拜托～

lorrain_cc

恩..今天一天有两人问这题..
有that其实也对,也就是one that they believe to be of
只是如果that做定语从句宾语的话,习惯上是省略的,