Tick the sentences that are correct. Rewrite the incorrect sentences. Insome cases, more than one modal is possible. Three sentences are correct.
1. I may go out later with my friends, but I’m not sure.
2. There’s a lot of traffic today so the bus has to arrive late.
3. Students might not talk during the written exam.
4. Paula plays the piano and she can sing quite well, too.
5. You ought to wear a uniform when you’re in the army.
6. Children don’t have to eat too much ice cream.
7. There may not be time to go to the shops because they close soon.
8. Yes, you can go out tonight but you might be home no later than 11pm.
9. I’m on holiday now so I must'n get up early. It’s great!
10. I haven’t got my watch on, but I think it can be about 6.30 now.