求解惑GWD-24-41新问题以及知识点指错

yakev6

1."struggles" is the subject as it relates to the verb "limit"; the ants are the main subject of the entire second half.

It's the struggles that (potentially) limit the spread of the species.(so C is out)

2.it vs their

"it" cannot be genetically similar to itself; eliminate B and C.

the semicolon divides the sentence, so "their" properly refers to "the ants" after the comma （the preferred rule that antecedent is often placed after the pronoun is broken here）


its refers to species  （here is a collective noun，you can get this knowledge through the manhattan SC）

-- by 会员 DUKB24 (2012/9/11 8:41:37)

刚刚有人问这题，搜到dd的帖子顺便顶一下
我是这么理解的It is so adj, xxxx that limits xxxx.
that不是定语从句，而是一个so that 结构，因此要和主语主谓一致.