whatever subject you choose,you must be to gain s first or supper second class degree,since this--along with the position of the graduate's university--is the first principle for selection that most employers make.
whatever subject you choose是条件状语从句, you主语must be to gain 谓语。
since this is the first principle for selection 是由since引导的原因状语从句。 that most employers make. 是修饰 selection 的定语从句 along with the position of the graduate's university是用来补充说明this的具体内容的,
whatever subject you choose是条件状语从句.“无论你选择什么学科,....” you must be to gain 是主句的主语和谓语。 “你都必须首先要获得s或....” since this is the first principle for selection that most employers make. 是由since引导的原因状语从句。“因为这是.....” along with the position of the graduate's university是用来补充说明this的具体内容的,即指代 “s or supper second class degree”。