Mr. Green has two sons, one of _____ working as a bus driver now.
A．who B．whom C．them D．whose
Mr. Green has two sons, one of _____ working as a bus driver now.
A．who B．whom C．them D．whose
C
【解析】
试题分析：考查定语从句。句意：格林先生有两个儿子，其中一人现在是作为一名公共汽车司机在工作。填whom，注意one前面是逗号，说明前面的句子还不完整，而后面是个定语从句。如果one前面是句号，则填them。故选C。
考点：考查定语从句