一道语法题 找不到结构

tc_zn2001UID: 187494

10． _________, dolphins have no sense of smell.
(A) As known as far
(B) Known thus far as
(C) It is known as far
(D) As far as is known

答案选D  但是 感觉很奇怪  as far as (it) is known  不用有个主语吗?

tc_zn2001UID: 187494

12.Scientists believe that by [altering] the genetic composition of plants it is possible to develop specimens that are [resisting] to [disease] and have [increased] food 答案为B。

这是人家问过的一题 不过不明白   B改为resistent确实好一些
但是C 的disease是不是应该加s啊?  这样B的resisting 把它当作形容词性可以吗?

tc_zn2001UID: 187494

自己顶一下  高手 赐教   谢谢

dinddind2003UID: 196353

第十题：这句话的主语是dophins，不能有其他主语，as far as is known 是状语，而且是固定搭配。

12。resist是vt.所以后面不能加to，同时没有resisting这个形容词。desese可以泛指疾病，总之在试题里不是很明显的话最好不要随便对复数产生怀疑。

tc_zn2001UID: 187494

谢谢  明白了