请教大全895

1.        Unlike most warbler species, the male and female blue-winged warbler are very difficult to tell apart.

(A) Unlike most warbler species, the male and female blue-winged warbler are very difficult to tell apart.

(B) Unlike most warbler species, the gender of the blue-winged warbler is very difficult to distinguish.

(C) Unlike those in most warbler species, the male and female blue-winged warblers are very difficult to distinguish.

(D) It is very difficult, unlike in most warbler species, to tell the male and female blue-winged warbler apart.（E）

(E) Blue-winged warblers are unlike most species of warbler in that it is very difficult to tell the male and female apart.

请NN分析一下这题吧，谢谢啦：-）

我觉得这题关键问题在unlike...和主语的一致性

ＡUnlike most warbler species, the male and female blue-winged warbler

Ｂ Unlike most warbler species, the gender of

Ｃ Unlike those （指代不清，和主语也存在一致性问题）in most warbler species, the male and female blue-winged warblers

请问：E选项得主语为 Blue-winged warblers 后面用it is very difficult 符合单复数一致的原则吗？

(E) Blue-winged warblers are unlike most species of warbler in that it is very difficult to tell the male and female apart.

it是形式主语, 代后面不定式to tell the male and female apart.

一知半解

A：...the male and female blue-winged warbler are...

——the male(blue-winged warbler) and female blue-winged warbler are...

——the male and female blue-winged warblers are

——the male and female blue-winged warbler is ....

？？？

对题中的warbler的单复数也很不清楚。the male and female blue-winged warbler are ？