Alec asked the policeman with whom he worked to _______ him whenever there was an accident.

 A. contrast                  B. attract    C. contact     D. attack

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

1. A.
   with him
2. B.
   who
3. C.
   with whom
4. D.
   whom

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

A. with him       B. who              C. whom         D. with whom