A．was most active in the mid—l960s．   
B．has been ended entirely.   
C．has been strictly regulated．
D．is still very popular.

A．a conntl'y could join only when being a whaling nation- 
B．had the right to end commercial whaling entirely.
C．colleered the world’S opinion to show concerns for whales. 
D．had no authority for punishing violators．

A．Several species of whales now face extinction.
B．The world is less fascinated with whales nowadays now.
C．Norway，Iceland and Japan are the only commercial whaling nations.   
D．The blue whale is the largest animal in the world．