1) Detective, my son __ (not / steal) that car last Sunday afternoon. He was getting married at that time in front of 200 guests! a) CAN'T HAVE STOLEN b) SHOULDN'T HAVE STOLEN c) MAY NOT HAVE STOLEN 2) That smart girl studied a lot, so she __ well on the test, but she didn’t. a) MAY HAVE DONE b) SHOULD HAVE DONE c) MUST HAVE DONE 3) —Who broke the big vase in the back office? —It __ (be) Brian – he’s very clumsy. a) should have been b) can't have been c) might have been 4) A giant asteroid hit the Earth in the Gulf of Mexico 65 million years ago. Scientists have reached a conclusion they’re pretty confident about: that __ (cause) the extinction of the big dinosaurs. a) may have caused b) should have caused c) must have caused 5) I’m not sure where the boss went this morning. He __ (go) to our other branch office in Glendale. a) might have gone b) should have gone c) would have gone 6) The big grammar test is today. I’m in trouble – I __ (study) last night, but I didn't! a) should have studied b) had studied c) may have studied 7) —I didn’t know who to ask for help. I don't know what university I should go. -Oh, you __ (talk) to Karen – she’s our school’s university adviser a) must have talked b) had to have talked c) could have talked 8) Uh-oh, you broke Dad’s favorite pool. You __ (not / do) that – you’re going to be in big trouble. a) may not have done b) could have done c) shouldn't have done

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