GRE Text Completion: Fundamental 24 Sets-GRE填空基础24套 - I6II4B0QTR28QW17!

As head of the National Education Association in 1965-66, Elizabeth Duncan Koontz advocated higher salaries for teachers because she believed that the more ____________ teaching is, the greater its attraction for highly qualified people. A. precarious B. dubious C. controversial D. lucrative E. productive F. profitable