It gets _______ to understand what the professor has explained.

A. The more rich / the more happy         

B. The richest / the happiest

C. The richer / the happier

D. Richer and richer / happier and happier

A. younger and more intelligent than

B. more young and intelligent than

C. more intelligent and younger than

D. the more intelligent and younger than

A. more and more good  

B. better and better         

C. the more and more good        

D. gooder and gooder

A. money more than

B. as many money as      

C. more money as

D. as much money as

A. taller

B. the more tall

C. the tallest                    

D. taller and taller

A. the sooner we can leave         

B. we can leave sooner and sooner

C. the sooner can we leave                     

D. we can leave the sooner

A. the largest of the two

B. the more larger of the two     

C. one of the two largest

D. one of the two larger