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

—Why does she always ask you for help?
—There is no one else , is there?
A. who to turn to　
B. she can turn to　
C. for whom to turn
D. for her to turn

A. who to turn to　(答案→)B. she can turn to　C. for whom to turnD. for her to turn解析：把定语从句还原成一个句子，即:She can turn to no one else(for help).答案就明朗了。

你的回答很对