问题补充:
In the dark street, there wasn’t a single person she could turn for help.
A. who
B. whom
C. that
D. to whom
答案:
A. who
B. whom
C. that
(答案→)D. to whom
解析:本题考查定语从句。根据句意表示“向某人求助”是turn to sb. for help,其中介词to可提前,故答案为D。本句也可以如下表达:In the dark street, there wasn’t a single person (who/whom/that) she could turn to for help.)