填空题

In many countries today, laws protect (36) In India the need for such protection was realized centuries ago. About 300 BC, an Indian writer (37) that forests were like national parks today. The game of killing beasts was carefully (38) . Some animals were fully protected, nobody was allowed to cut down (39) , hum wood for (40) ,or (41) animals for their (42) Animals that became dangerous to human visitors were trapped or killed outside the park, so that other animals would not become (43) (44) About a thousand species(种类) of animals are in danger of dying out, and the rate at which they are being destroyed has increased. (45) From AD 1 to 1800, the rate was about one species every fifty years. (46)