______had been done,the working efficiency of the employees still remained low.

______had been done,the working efficiency of the employees still remained low.
A\Though
B\Despite the fact that
C\Despite
D\Despite what
B、D不是一样吗?我怎么总觉得少了点什么,答案给的是D,我选的A,还有,顺便讲讲什么spite之类的跟句子、跟词什么的
答：D
译：尽管已经采取了一些措施,但是雇员的工作效率仍然低下.
析：BD不一样.
Despite是一个介词=in spite of ,后跟一个名词（或名词性的从句）作宾语,意思为：尽管存在着.,相当于：though there is/was ...
如：Despite (=In spite of ) the rain,the football game continued.尽管天下着雨,足球赛还是继续.
注意：汉译中我不说：尽管存在那场雨,而说：尽管天下着雨=though it was raining,...
What had been done是一个名词性的从句,相当于the+名词+定语从句=the things that had been done,就是 那些已经做过了的事.Despite what-从句就相当于Despite +一个名词词组.
这个名词性从句也可以是由that引导的一句话,如：
Despite that he is 18 years old,he is still naive.
=Despite the fact that he is 18 years old,.
这时候,despite的宾语是 the fact,that从句是fact的同位语.
可以看出,我们可以用though/although来代替despite that/ despite the fact that
though是一个从属连词,引导一个让步状语从句.如选A,请问从句的主语呢?是不是需要补上“much (=a lot (of things))”?排除A
Despite the fact that,that引导的是同位语从句,that在从句中不担任句子成分,但不能省,如选B,则这个同位语从句又缺乏主语,排除B.
C根本不用考虑.
顺便再说一下,in spite of = despite 是个介词.