求教一道语法IV

alex

[U]Unlike most warbler species, the male and female blue-winged warbler are very difficult to distinguish.[/U]
A.
C. Unlike those in most warbler species, the male and female blue-winged warblers are very difficult to distinguish.
E. Blue-winged warblers are unlike most species of warbler in that it is very difficult to tell the male and female apart.

标准答案为E，但我认为C答案也对，请问有什么问题？

Peace

To Alex,

这道题一开始我也选C， 后来看了LZM的解释才豁然开朗。

这是LZM书上的解释：

C中，those指代主句的主语 the male and female blue winged warble, 而不能仅指代
the male and the female, 因为主句的主语不是 the male and female in the
blue-winged warbles 这种结构。 而当把those指代的内容代入unlike短语中，unlike短语
不知所云。

希望对你有帮助！

alex

up and tks!

joywzy

i am still confused with these two choices. Would u please explain in detail?

thanks!

mindfree

我认为还有一点: difficult to distinguish (tell apart). It is difficult to tell A and B apart显然比A and B are difficult to distinguish要常用. it is difficult的结构更清晰.