【推荐1】_______ the impact of human activities continues to grow and the list of species in danger of extinction becomes longer, we are left with a question: can we afford to damage the “lungs of the planet”? (用适当的词填空)

【推荐2】Most people have to get to a point where they don’t have a choice ________they will change something. (用适当的词填空)

【推荐3】It is almost five years ________ we saw each other last time. (用适当的词填空)