Write the correct word or phrase.

1. I've been having swimming lessons and now I can / could swim really well.

2. Please could / should I use your mobile phone? Mine doesn’t have any power.

3. Sam could / ought to get a job instead of complaining about having no money.

4. Okay, yes - you can / should leave five minutes early today.

5. Do you think I must / should tell Michael the truth about what happened?

6. I can’t / couldn’t read until I was five years old.

7. I’m sorry, but you can ’t / couldn’t leave your car there.

8. If you want to pass the exam, you can / ought to do some revision.

9. I know John lived in Tokyo, but I don't think he can / may speak Japanese.

10. Tracy can / could sing really well now that she's had a few lessons.