— Do you know the girl is from Canada?— Yes her name is Helen. A. whomB. whoC. whichD. W

问题补充：

— Do you know the girl is from Canada?

— Yes, her name is Helen.

A. whom

B. who

C. which

D. Whose

答案：

A. whom

(答案→)B. who

C. which

D. Whose

解析：句意：你认识来自于加拿大的那个女孩吗？是的，她的名字教海伦。划线后面的内容为一定语从句，修饰先行词the girl；指人，关系词用that或者who；故选B。