sentence correction请教

nickynicky

15.    Archaeologists in Ireland believe that a recently discovered chalice, which dates from the eighth century, was probably buried to keep from being stolen by invaders.
(A) to keep from
(B) to keep it from
(C) to avoid
(D) in order that it would avoid
(E) in order to keep from

我选了c，答案是B
，为什么一定要用keep it from 呢？

祈晴坊主

以下是引用nickynicky在2003-10-4 15:38:00的发言：
15. Archaeologists in Ireland believe that a recently discovered chalice, which dates from the eighth century, was probably buried to keep from being stolen by invaders.
(A) to keep from
(B) to keep it from
(C) to avoid
(D) in order that it would avoid
(E) in order to keep from

我选了c，答案是B
，为什么一定要用keep it from 呢？

因为要加出逻辑主语啊
如果avoid ,那么不知道到底是
Archaeologists 还是a recently discovered chalice被避免怎么怎么了

呵呵
BTW
以后可以发到语法区里，那里很多NN会帮助解答的

nickynicky

豁然开朗。
谢谢！