gwd8-17中一个被忽略的问题

qwrersaa

Q17:

Fossils of a whale that beached on an African shore more than a million years ago and was subsequently butchered by hominids have been recovered by paleontologists.

A. that beached on an African shore more than a million years ago and was subsequently butchered by hominids have

B. that beached on an African shore more than a million years ago and then was subsequently butchered by hominids has

C. that beached on an African shore more than a million years ago, which was subsequently butchered by hominids, has

D. having been beached on an African shore more than a million years ago and subsequently butchered by hominids, have

E. having beached on an African shore more than a million years ago and then subsequently were butchered by hominids have

查了一下以前的贴子，好像还没人问这到题。答案是a,因为其他的都有明显的错误。但a中，beached 和was subsequently butchered 明显不对称啊，beached不会是一个主动动作吧？请教各位，谢谢。

mary1

beach [transitive] 1.　to pull a boat onto the shore away from the water 2.　if a whale beaches itself or is beached, it swims onto the shore and cannot get back in the water