1) Detective, my son __ (not / steal) that car last Sunday afternoon. He was getting married at that time in front of 200 guests! a) COULDN'T HAVE STOLEN b) SHOULDN'T HAVE STOLEN c) MAY NOT HAVE STOLEN 2) That smart girl studied a lot, so she __ (do) 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) ought to 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) may 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) should of studied c) may have studied 7) Taylor Swift’s latest boyfriend just left her for a younger girl who isn’t even famous. She __ (not / be) happy when she found out! (She'll probably write a song about it.) a) shouldn't have been b) can't have been c) would rather have been 8) —I didn’t know who to ask for help in choosing an American college. -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 9) Uh-oh, you broke Dad’s favorite pool cue. You __ (not / do) that – you’re going to be in big trouble. a) may not have done b) must not have done c) shouldn't have done 10) I was at the DMV office yesterday. I __ (renew) my driver’s license. a) may have renewed b) had to renew c) must have renewed

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