good use you have made of your time to work there is still some room for improvement.A.

问题补充：

good use you have made of your time to work, there is still some room for improvement.

A. Whatever

B. However

C. Though

D. Whether

答案：

(答案→)A. Whatever

B. However

C. Though

D. Whether

解析：考查让步状语从句。句中good use放在一起是一个名词，用whatever修饰。句意：不管你怎么很好得利用你的时间去工作，还是有提升的空间。