CD语法笔记有一题不明！！请教XDJM

gerry0601

13. In western North America, _____ form the Great Divide, which separates the areas from which waters flow either eastward to the Atlantic or westward to the Pacific.

(A) the Rocky Mountains

(B) where the Rocky Mountains

(C) the Rocky Mountains in which

(D) there are the Rocky Mountains

答案是A！！

我选的D

gerry0601

谢谢大家，小弟把form看成from了

晕啊！！！