1) Where's Clare? Her bag's here and her computer's still on so she _____ gone home. a) must have b) might have c) can't have 2) I can't remember my password! But I _____ written it in my notebook as sometimes I do that. a) must have b) might have c) can't have 3) Sorry, I don't know if she's here or not. She was feeling ill so she _____ gone home. a) must have b) might have c) can't have 4) She cleaned the whole house on her own in two hours. She ____ had some help. a) must have b) might have c) can't have 5) Wow! Have you finished all that already? You _____ been hungry! a) must have b) might have c) can't have 6) The brakes aren't working! They ______broken by my ex. I'm pretty sure. a) can't have been b) might have been c) must have been 7) They found the money and jewelry in his pockets. I don't believe he's a thief. He ________set up by his colleague. a) must have been b) can't have been c) must have  8) Look! He's hot in the face. - He ___________run a marathon, but I'm not really sure. a) can't have b) may have c) might 9) You must be more careful. You______ killed crossing the street without looking. a) must have been b) could have been c) might have 10) Oh, great! His car's here. He _____ come home earlier than planned. a) might b) must have c) should have 11) He _____ known about it when I saw him. I'm sure he would have told me. a) must have b) couldn't c) can't have 12) She ______ got lost. Otherwise she'd be here by now. a) must have b) must have been c) can have 13) That pizza was gigantic. I'm sure Mary _______ eaten it all. a) can't have been b) can't have c) mustn't have 14) You __________ my advice and gone to the doctor. Your cold is not going to get better if you wait. a) shouldn't have taken b) should have taken c) shouldn't taken 15) We ate in fast food yesterday and today we have indigestion. - You_________ fast food. a) shouldn’t have eaten b) should have eaten c) shouldn’t eaten 16) I bought a T-shirt without trying it on. When I came home, I saw that it was too small. - You __________ it on. a) should've tried b) must have tried c) should have tried

SO_9_ Past modals of deduction and advice

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