Решение:
- The rash on my arm is so painful. It hurts a lot.
- I was on crutches for six weeks after my accident.
- My sister needed an operation when she broke her arm.
- I hated being a patient in hospital. It was so boring!
- It's important to wear a helmet when you ride a bike.
- I had to brake quickly when I saw the cat in the street.
Ответ: 1. hurts a lot; 2. crutches; 3. operation; 4. patient; 5. helmet; 6. brake.