— Why does she always ask you for help?— There is no one else is there?A. who to turn to

问题补充：

— Why does she always ask you for help?

— There is no one else , is there?

A. who to turn to

B. for her to turn

C. for whom to turn

D. she can turn to

答案：

A. who to turn to

B. for her to turn

C. for whom to turn

(答案→)D. she can turn to

解析：考查定语从句。本题定语从句的先行词是no one else，定语从句中whom指代先行词作为动词短语turn to的宾语，动词短语turn to sb (for help)向sb求助；句意：—为什么她总是向你求助？—没有她可以向之求助的人，是吗？故D正确。