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Answer:
1. Mr. Santos said that they had to take care of their learning situation.
2. The scientist explained that the ozone hole over Antarctica remained alarmingly large.
3. They reported that a second hole developed over the Arctic.
4. The one environmentalist stated that our planet is in the grave trouble.
5. The SK officers uttered that they would launch (or launched) an environmental program next week.
Explanation:
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