C 不好,因为句子有不太完整的感觉。difficult to be distinuished。from each other加上会更好些。而且用了被动语态,动作执行者是谁?
为什么,GMAT特别反感被动,我觉得除烦琐外,还避免了动作执行者不清所引起的麻烦。曾有实际的商业案例,就是在合同及备忘录中英语的表达上出问题,让一香港人白亏800万(1987年)
Check Unlike, species can't be compare with warbler????????
IS IT RIGHT?
Unlike other fruits, the apple is known as the symbol of New York city.
我觉着crackok斑竹说的有道理。