In the dark street there wasn’t a single person she could turn for help. A. thatB. whoC.

问题补充：

In the dark street, there wasn’t a single person she could turn for help.

A. that

B. who

C. from whom

D. to whom

答案：

A. that

B. who

C. from whom

(答案→)D. to whom

解析：考查定语从句。先行词为 a single person在从句中作宾语，“向某人求助”应该用turn to sb for help ，因此先行词作to的宾语。答案选D。