Phrasal Verbs with 'Go'

Half of the phrasal verbs in the following sentences use the wrong preposition. Decide which
ones are wrong and replace them with the correct preposition, which you will find in the other sentences.

1. The burglar alarm went off in the middle of the night, waking everybody up.
2. I think this fish has gone down - it stinks.
3. She went about her new boyfriend quite quickly when she discovered his nasty habits.
4. The police investigating the murder don't have much to go on.
5. What on earth is going out here?
6. The fire went on and the room gradually became cold.
7. The bomb went off when there were still lots of people in the building.
8. The firm went out of business last week and their office has closed off.
9. The price of bread has gone on again. Last week it was 60p a loaf, now it's 70p.
10. They decided not to go through with their plans because of opposition from the
neighbours.
11. Before you sign your contract, you should go over it carefully with a solicitor.
12. We'd like to start our own company, but aren't sure how to go off it.
13. She said she had a new job but refused to go into details.
14. She went up speaking for two hours without stopping.
15. There wasn't enough ice cream to go round, so some of the children had chocolates
instead.
16. Tony's going out with a girl from work. I think he's quite serious about her.