单项选择题
A. Protection of Environment. B. Policies to European countries. C. Agenda on helping poor countries. D. Reduction of greenhouse gas emission.
A. The salinity of the ocean. B. Pollutants found at sea. C. The composition of coral reefs. D. The weather patterns of coastal areas.
A. Shooting and recreation. B. Shooting as a sport. C. Shooting and movie. D. The history of shooting.