Complete the positive sentences [+], negative sentences [-] and questions (?) using the subject, modal and verb in brackets.

Solution:

1. We can save elephants.
2. Elephants can't be in danger.
3. There will be any elephants.
4. Icebergs will melt in the summer.
5. There won't be any ice in our oceans.
6. People will cut down the rainforests.
7. Rainforests will not exist.
8. Rivers will be more polluted and all the fish will die.
9. The Earth's climate will get hotter.
10. Many plants and animals will die out.
11. Scientists will be able to solve the problem of global warming alone.
12. We will destroy the environment.

Answer: 1. We can save elephants. 2. Elephants can't be in danger. 3. There will be any elephants. 4. Icebergs will melt in the summer. 5. There won't be any ice in our oceans. 6. People will cut down the rainforests. 7. Rainforests will not exist. 8. Rivers will be more polluted and all the fish will die. 9. The Earth's climate will get hotter. 10. Many plants and animals will die out. 11. Scientists will be able to solve the problem of global warming alone. 12. We will destroy the environment.