A．To show interest to ecology.
B．To criticize people for ignoring others interests.
C．To make people aware that they are destroying their own living surroundings.
D．To attract more people to study ecology so that they can discuss it more often.

A．To look for a part-time job here.
B．To borrow "War and Remembrance."
C．To borrow a novel for some light reading.
D．To learn to use the library as efficiently as possible.