Choose the right preposition for each gap.

1. They collected money to provide aid ... the homeless.

2. John is allergic ... cats.

3. The doctor will operate ... him.

4. He suffers ... asthma.

5. I don’t know how he copes ... his injury.

6. He’s addicted ... painkillers.

7. Getting into an exercise routine can be hard if you are recovering ... an injury.

8. Certain pills can lead ... heart attacks.

9. He complained to us ... the incident.

10. She complains ... headaches.