问题
选择题
The old professor, to_______ the important invention _______, decided not to keep it for himself, but to make it known to all over the world.
A．whom; was belonged
B．which; belonged
C．whom; belonged
D．which; was belonged
答案
答案：C
考查定语从句。句中先行词为professor，在从句中作宾语，故用关系词whom；belong to属于，不及物词组，无被动形式，故选C。