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ANSWER KEY:
- It was the drought that made people suffer in this area.
- The top of the volcano was (the place) where we climbed during our excursion.
- It’s renewable energy that will provide a better environment for all of us.
- It was the environmentalist at the conference who explained how renewable energy resources will change the environment.
- What the firefighter did was (to) save many lives from the fire yesterday.
- It was the professor who advised the prime minister to implement wind energy in the country.
- It is global warming that makes the polar bears starve. / It is global warming that is starving the polar bears.
- What happened was (that) the heatwave killed many animals in the forest.
- It’s a fertile land that we need to grow healthy vegetables.
- What will happen is (that) you will grow those vegetables faster if you give fertilizers to them.