He's spent years cultivating a knowledge of art.

A．sharing    

B．using    

C．denying 

D．developing

I enjoyed the play-it had a clever plot and very funny dialogues．

A．long    

B．boring    

C．original    

D．humorous

The two banks have announced plans to merge next year．

A．combine    

B．close    

C．break     

D．sell

Such a database would be extremely costly to set up．

A．establish    

B．destroy    

C．update    

D．transfer

We've seen a marked shift in our approach to the social issues．

A．clear    

B．regular    

C．quick     

D．great