Question

Barack Obama delivered a speech to 500 local youths during his visit to China, many of _______ were from Fudan University and Tongji University.

A．them

B．whom

C．which

D．those

Answer 1

B

考查定语从句。根据先行词500 local youths可知当前面有介词是指人的引导词只能使用whom，故选B。