Gorillas will become extinct unless we stop destroying forests., Sea turtles will become extinct unless we stop polluting the sea., Elephants will become extinct unless we stop buying ivory products., Hunters kill tigers for their skin. Therefore they are endangered., Birds will become extinct unless we stop cutting down trees., People destory bamboo forests. Therefore there is not enough bamboo for pandas to eat., People catch reef fish to sell in restaurants. Therefore there are very few left in the sea.,

6B Unless / Therefore

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恢復自動保存: ?