a)
- when they were born, their social class and their gender
- their career
- probably where they ended up living
- everything - they want another chance
- their tendency to worry
- probably a woman who wants to change her husband's behaviour
b)
- 4
- 5
- 3
- 6
- 2
- 1
c)
- a, b
- c, e, f
- d
d)
NB The main / strongest stress is on the last word in each sentence.
- I wish I could do it all again.
- I wish I weren't so anxious.
- I wish I'd stayed where I was happy.
- I wish he'd pay more attention to me.
- If only I hadn't become a doctor.
- If only I'd been born twenty years later.