1．There were several messages from people，most of __________ I didn’t know，on my answering machine when I got home.
A．those B．which
C．whom D．them
解析：选C。考查定语从句。分析句式结构可知，如果选择A、D两项，则构成独立的分句，缺少连接词；B项关系代词which只能指代物。C项whom引导定语从句，修饰先行词people，并在从句中作of的宾语。故C项正确。
