1) Sarah looks very happy. She_____________________ her driving test. a) can't have passed b) may have passed c) must have passed 2) Jim hasn't arrived yet. He ___________________ the wrong train. a) may have taken b) may not have taken c) can't have taken 3) You __________________ ill yesterday. I saw you at Juliet's party. a) must have been b) could have been c) can't have been 4) She ______________ there. Her car keys are still here. a) can't have driven b) must have driven c) may have driven 5) I __________________ a teacher, but I decided to become a lawyer. And, I'm happy with my choice. a) can't have been b) could have been c) must have been 6) I thought I saw Adnan this morning but it ____________ him – he's in Greece this week. a) couldn't have been b) must have been c) may have been 7) Nick __________________________ his job because his staff is in his office. a) may not have left b) shouldn't have left c) can't have left 8) I think I _______________ the air conditioning on. Please can you check? a) can't have left b) might have left c) may have left 9) Lucy didn't come to work today. She__________________ ill. a) may have been b) can't have been c) should have been 10) The thief must have had a key. The door was locked and nothing was broken. a) can't have had b) may have had c) must have had

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