Rewrite the sentences. Use: could, should, can/can't, mustn't or didn't have to.
1 It's forbidden to park your car here.
2 It wasn't necessary for Jo to make
a donation.
3 It's impossible for Alan to get
unemployment benefits.
4 Is it OK if I borrow your car?
5 John had the ability to write when
he was three years old.
6 It's a good idea to hold a
fundraiser.