翻译：我永远不会相信任如你描述的那样一个人.
此题考查定语从句的关系词.
相关语法规定：如果先行词被such/so/as/the same修饰时,则定语从句的关系代词一般使用as.
该题中,as代替先行词a man,在定语从句中充当described的宾语.
即：as you described
= you described as
= you described a man
再如：I‘ve never used such a thing as you lent me.
我从来没用过你刚才借给我的那样一个东西.