1 Choose the correct word.
1 The ballet dancer was fantastic! She must / could have practised very hard to give such a
great performance.
2 The acrobat couldn't/ shouldn't have been very experienced because he kept losing his balance.
3 I would / should have gone with you to the concert if you had called me earlier.
4 You mustn't/can't have seen this film. It's only just come out!
5 I should / must have bought more expensive tickets. I can barely see the singers from these seats!​