1. It is undoubted that people must stop over-exploiting, over-using and wasting energy sources right now. Without .............................................................................................. (doubt) 2. Our environment will treat humans in a way that human have treated it. Humans .................................................................................................... (be) 3. The government should penalize all the families with more than 2 children. All the families .......................................................................................... (be) 4. What are the common causes of over-population? How .......................................................................................................... (be) 5. Surprisingly, some European countries have to import trash from other countries to recycle. It ................................................................................................... (surprising)
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Sinh Học lớp 12
