Here are the sentences completed:

1. I have a dislocated finger.
=> If only I didn't have a dislocated finger.

2. My daughter never calls me.
=> I wish she would call me sometimes.

3. Our school doesn't have recycling bins.
=> I wish our school had recycling bins.

4. My friend isn't talking to me.
=> If only my friend would talk to me.

5. Fast-food is bad for you.
=> If only fast-food weren't bad for you.