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МатематикаВопрос:
3.Who has been studying the problems?
Ответ:
3. Scientists have been studying these problems.
Похожие
- 1.They have been burning plastic.
- 2.She has been throwing rubbish.
- 3.We have been wasting water.
- 4.He has been polluting the river.
- 5.People have been cutting trees.
- 6.Factories have been emitting gases.
- 1.What have factories been emitting?
- 2.What has polluted the rivers?
- 4.What has the government been trying to do?
