1) She ______________ studied really hard. She passed all her exams with excellent grades. a) might have b) must have c) can't have 2) The boss is in a terrible mood. The meeting __________ been good. a) must have b) might have c) can't have 3) Sarah ________ been so happy when she found out she was being promoted. a) might have b) must have c) can't have 4) I had to wait 45 minutes for a bus yesterday. There __________ been an accident or maybe a strike. a) might have b) may not have c) can't have 5) He __________ bought a new car. He doesn't have any money. a) may have b) can't have c) must have 6) Andrew did no revision for the exam but he's passed. I think he ___________ cheated. a) can't have b) may have c) may not have 7) I left my bicycle in front of the library and it's disappeared. Someone ____________ stolen it. a) can't have b) may not have c) must have 8) I'm sorry but Samantha isn't here. She ____________ already left the office. a) must have b) can't have c) may have 9) He __________ known it was your birthday. Otherwise, I'm sure he would have wished you a happy day. a) can't have b) may have c) must have 10) Perhaps I was wrong. I ____________ made a mistake. a) might have b) can't have c) might not

RFF - 9.2 - Modal verbs of deduction p. 114

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