This dictionary few pages are missing is of great importance. A. among whichB. of whichC

问题补充：

This dictionary, few pages are missing, is of great importance.

A. among which

B. of which

C. in which

D. to which

答案：

A. among which

(答案→)B. of which

C. in which

D. to which

解析：考查定语从句。先行词为This dictionary，few pages 属于This dictionary，所以用of which，句意：这本字典，它当中的几页不见了，非常重要。所以选B。