As a volunteer of the 2012 London Olympic Games, which sign will you prepare to remind people to keep the environment clean?
A.![]() |
B.![]() |
C.![]() |
D.![]() |
As a volunteer of the 2012 London Olympic Games, which sign will you prepare to remind people to keep the environment clean?
A.![]() |
B.![]() |
C.![]() |
D.![]() |