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Ответы
b) Model: Scientists study a wide variety of subjects.
Do scientists study a wide variety of subjects? --- Yes, they do.
Scientists study a wide variety of subjects, don't they? -
Yes, they do.
1. Some scientists search for clues to the origin of the universe.
Do some scientists search for clues to the origin of the universe?--- Yes, they do.
Some scientists search for clues to the origin of the universe, don't they? -
Yes, they do.
2. Scientists examine the structure of the cells of living plants and animals.
Do scientists examine the structure of the cells of living plants and animals?--- Yes, they do.
Scientists examine the structure of the cells of living plants and animals, don't they? -
Yes, they do.
3. Other researchers investigate why we act the way we do.
Do other researchers investigate why we act the way we do?--- Yes, they do.
Other researchers investigate why we act the way we do, don't they? -
Yes, they do.
4. They solve complicated mathematical problems.
Do they solve complicated mathematical problems?--- Yes, they do.
They solve complicated mathematical problems, don't they? -
Yes, they do.
5. Scientists use systematic methods of study.
Do scientists use systematic methods of study?--- Yes, they do.
Scientists use systematic methods of study, don't they? -
Yes, they do.