18. I decided to write about Chaplin, one of ______ films I had seen several years before.

       A. whose                     B. whom                      C. that                         D. which

I decided to write about Chaplin, one of ______ films I had seen several years before.

　 A. whose 　　　　 B. whom　　　　　　 C. that 　　　　　　 D. which

18. I decided to write about Chaplin, one of ______ films I had seen several years before.