Circle the correct preposition.

1. Some spiders can bite through/out clothing.
2. The doctor injected medicine into/on her arm.
3. Some jellyfish are difficult to see as the are nearly invisible with/to people.
4. Bob suffers with/from hay fever and has itchy.
5. Avoid the river at/of all costs, it is full of crocodiles.
6. His rash may last for/with a few weeks.
7. Please stay away/out from the water, there are sharks.