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

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 whom to turn

C. she can turn to

D. for her to turn

答案：

A. who to turn to

B. for whom to turn

(答案→)C. she can turn to

D. for her to turn

解析：考查定语从句和词组搭配。turn to可表示求助于某人，‘she can turn to’作定语从句，省略了关系代词who/whom。根据句意“—为什么她总是请你帮忙？--她没有其他人可以求助，是吗？”选C。