Question

Alec asked the policeman _________ he worked to contact him whenever there was an accident.

[　　]

A．with him

B．who

C．with whom

D．whom

Answer 1

答案：C
解析：

题意为：“Alec让与他一起共事的警察一旦有事故便同他联系。”定语 从句的先行词是the policemen。with whom 即with the policeman。