1) Mike __________ have taken the car, he hasn't got the keys. a) can't b) mustn't 2) Oh no, I __________ have left my credit card at home. a) must b) can 3) My new shoes don't feel comfortable, I __________ have bought them. a) couldn't b) shouldn't 4) I don't know why they didn't come – they __________ not have been invited. a) must b) might 5) I'm not surprised you feel sick. You __________ have eaten so much food at the party. a) shouldn't b) mustn't 6) Jane __________ have been in the pub, she was studying for an exam. a) mustn't b) couldn't 7) I'm sorry you failed your exam, but you __________ have worked harder. a) must b) should 8) I think the murderer __________ have known the woman, because she let him into the house. a) should b) might

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