Choose the right word for each gap.

1. It is possible that in the following years penguins will ... extinction due to the global warming.
2. Exercise plays an important ... in keeping fit and healthy.

3. I’m so sorry if I ... you problems.

4. Doctors believe that stress is ... to heart disease.

5. He lost his job because he was ... of taking the initiative.

6. There is a small ... of brain damage from the medical procedure.

7. The situation ... for quick action.
8. They kept her ... on a life support machine for a whole year.