1) I __________________ (help) you last weekend if you had asked. a) must have helped b) can't have helped c) would have helped 2) We ___________________ (fix) the leak in the roof before the storm made it worse. a) might have fixed b) should have fixed c) must have fixed 3) The Smiths ______________________ (build) their house anywhere. Why did they choose here? a) can't have build b) must have builded c) could have built 4) If I had known about your accident, I _______ (phone) you. a) would have phoned b) must have phoned c) shouldn't have phoned 5) Lucy ________ (attend) the concert yesterday, but we aren't sure. a) can't have attended b) may have attended c) must have attended 6) You _________(finish) that book already! You only started reading it an hour ago. a) can't have finished b) should have finished c) may have finished 7) She _________(be) a lawyer but she decided to study accountancy instead. a) might have been b) could have been c) should have been 8) If you wanted to stay in that hotel you ___________(book) before! a) must have booked b) should have booked c) could have booked 9) I don't know why he hasn't called me back. He __________________________________________________ a) might have forgotten my number. b) shouldn't have forgot c) must have forgotten my number. 10) Look! Our car isn't in the driveway! Somebody _________________________________________ a) could have stolen it. b) must have stolen it. c) can't have stolen it.

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