主语：many people
谓语：chose （choose to do)
不定式做chose的宾语：to study
关系代词：which 引导“which they hope.springboard"定语从句 指代“many...study"这件事
不定式做目的状语 :to get (a good job 做此不定式的宾语）
定语从句：which they hope can be used as a springboard
关系代词：which 同时充当从句主语
插入语 ：they hope
谓语：can be used as (被用来作为.) （a springboard 做as 的宾语）
*或者整句话可以理解为 they hope that ("the further study" which they chose to do )can be used as a springboard to get a good job.