语法求助，这题根本没头绪！

Krome

Greatly influenced by the Protestant missionary Samuel Kirkland, the Oneida was the only one of the five-nation Iroquois League who sided with the colonists during the American Revolution.

• A
  
  was the only one of the five-nation Iroquois League who sided
  
  
  
• B
  
  was alone of the five-nation Iroquois League when they sided
  
  
  
• C
  
  alone among the five nations of the Iroquois League sided
  
  
  
• D
  
  were the only ones out of the five nations of the Iroquois League in siding
  
  
  
• E
  
  only of the five-nation Iroquois League had sided
  
  
  

答案是C，我选B。
C不是没有谓语吗？
A、B错哪里了？感觉也是可以的呀~
D我觉得是错在in doing，这个不对
E是错在没谓语吗？

nycnb

the Oneida, alone among the five nations of the Iroquois League, sided 这样好理解一点. A 中 who 错误指代the five-nation Iroquois League 而不是the Oneida, B, alone of the five-nation Iroquois League, 这里of 没这么用的

momoyi

C明显的谓语是sided，为什么说没有谓语呢？
D选项有个明显的were，而A和B用的是was。集合名词用单数，所以were不对。
A，who只能修饰人，而就近修饰league
B，they指代什么？句意应当是the Oneida, 但它是单数，没法指代，所以错。
E，明显的谓语是had sided，为何又是没谓语呢？你认为had sided起什么作用呢？ 时态不对，这里没有时间比较，不能用过去完成时。