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China`s rapidly growing population is the main threat facing large carnivores in the People`s Republic. Increasingly, policies aimed at limiting population growth have been (i)_____; nevertheless, the country`s vast size and the isolation of many of its regions mean that human populations in areas where large carnivores still occur (ii)_____. This human pressure has (iii)_____ the South China tiger.
- could start to decline
- can grow unchecked
- have stabilized
implemented , can grow unchecked , doomed 显示答案