In the dark street, there wasn’t a single person _________ she could turn for help
A.thatB.whoC.from whomD.to whom在线课程D
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。