8.    A huge flying reptile that died out with the dinosaurs some 65 million years ago, the Quetzalcoatlus had a wingspan of 36 feet, believed to be the largest flying creature the world has ever seen.

(A) believed to be

(B) and that is believed to be

(C) and it is believed to have been

(D) which was, it is believed,（C）

(E) which is believed to be

请问为什么b中的that 不能认为和A huge flying reptile that died out with the ...中的that 平行？谢谢.

C is best. 1)两个句子平行，意思连贯；2) it明确地指代the Quetzalcoatlus；3) 根据句意应该用完成时态believed to have been，句末的has ever seen是个暗示, to have been时态上与后面的the world has ever seen对应。

A, 错在believed to be修饰对象模糊，逗号+done做定语优先修饰前面就近的名词。参考大全174：

Elephants emit low-frequency sounds, believed to originate from a small area on their foreheads, that they may use as a secret language to communicate with other members of the herd.

主语+谓语+宾语，done。如果过去分词放在句末是修饰主语的，可以认为这个句型不是ETS喜欢的。

另外believed to be有Quetzalcoatlus现在仍存在的意味。to have been比to be好，to have been表believe之前就是的。

B中and that在这里that指带不对。Gmat中that一般不单独用来指代某物。

D, E的which一般只能指前面的名词wingspan，错。

补注：done或是形容词短语，放在句末，多是修饰前面的名词，而非首先修饰句首主语。当然在没有引起歧义的情况下，有时也指向主语。在前面有名词(a wingspan)的情况下，believed to be尽量不放在句末为好，也许the Quetzalcoatlus (believed to be)had a wingspan这样放置更清楚些。这题主要还是to be the largest flying意思表达不准确。