关于第9题,还有一点想问: 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(E) C 中 one they believe that it is of a type previously unknown to science. 用believe that...的形式,后面加宾语从句,为什么不行呢?是不是it指代的问题?还是别的? 请各位nn指教? |