The study you have been making ________ the ancient Chinese characters is an instructive job.
A. to B. for C. of D. from
The study you have been making ________ the ancient Chinese characters is an instructive job.
A. to B. for C. of D. from
C
因为make a study of是习语，意为“仔细研究”，句中you have been…characters是一个省略了关系代词的定语从句。