1.He climbed up the top of the temple ,from "where" he could see some things in the distance ．

1.where引导的的确是定语从句.from是一个特殊的介词,其后不但可以加名词/代词作宾语,而且还可以加上副词/介宾.比如：He comes from abroad.（abroad为副词）The tiger jumped from behind the tree.（behind the tre...关于第一个问题,您说是"from"本身是一个特殊介词,那么您看下面这个句子That was written in 1946,since______the education system has undergone great changes. A then B when C there D which 此句选when又是什么原因昵?since也是一个特殊的介词啊。在中学英语中，一般只有from/since/except有这种特殊用法，即其后不但可以加名词/代词做宾语，而且也可以加介宾/副词。