那A呢?A为什么不对? 我想是不是因为A和C都是需要用被动的呀.Unlike most warbler species, the male and female blue-winged warbler are very difficult to tell apart.是不是应该是"Unlike most warbler species, the male and female blue-winged warbler are very difficult to be told apart.
c中也是一样,除了TIANWAN版主说的以外, Unlike those in most warbler species, the male and female blue-winged warblers are very difficult to distinguish 是不是应该用" Unlike those in most warbler species, the male and female blue-winged warblers are very difficult to be distinguished." 谢! |