23/DQ8. 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 过分修饰/时态错

(B) and that is believed to be时态错/代词错and that在这里that指带不对。Gmat中that一般不单独用来指代某物。

(C) and it is believed to have been

(D) which was, it is believed,（C）which指代错

(E) which is believed to be which指代错/时态错

答案没有问题

我请教的是逗号+done优先修饰的是什么

A中的过分的修饰 修饰主语是可行的 意思清楚的

可在

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.

believed修饰的是sounds

搞不清了

谢谢