题目内容：

.—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

优质解答

选B,定语从句,先行词是no one else ,作turn to的宾语.
完整的句子如下：
---there is no one else that she can turn to （for help）,is there?