1) Sarah looks very happy. She .................. her Math test.  a) should have passed b) may have passed c) must have passed 2) The new assistant hasn't arrived yet. He ...............the wrong train.  a) must have taken b) may have taken c) can't have taken 3) You ............. sick yesterday. I saw you talking to our Geography teacher...  a) must have been b) could have been c) can't have been 4) She passed her Literature test with flying colors! She ............... a lot.  a) could have practiced b) must have practiced c) should have practiced 5) I think I ..................................... the air conditioning on. Please can you check? a) should have left b) might have left c) must have left 6) She ....................................there. Her car keys are still here. a) can't have driven b) could have driven c) may have driven 7) The astronomy teacher ...................................... his job because his stuff is in his office.  a) may not have left b) shouldn't have left c) can't have left 8) We don't know for sure that Alex broke the coffee table. It ................................. the dog. a) could have been b) might have been c) can't have been 9) Lucy didn't study the lesson. She ................................. tired. She's very responsible! .  a) must have been b) can't have been c) should have been 10) He knows a lot about medieval times. He .......................................... a lot about it. a) must have read b) can't have read c) should have read

Modals of deduction (PAST)

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