Complete the sentences using: can't, could, couldn't, might, must and mustn't with the correct form of the verb in brackets.


1. I can't stop; I really_______arrive (arrive) late to work again.

2. I thought I saw Danny the other day but then I realized that it________ (be) him as he's on vacation in Australia.

3. The medicine that the doctor gave you______ (work) if you'd taken it.

4. Where's the dog? He_______(escape) again! He's better than Houdini!

5. I can't find any of my winter clothes. I_______ (throw) them out by accident.​