1) Nobody knows exactly why he died. But we think it ________ been an accident. a) can have b) might have c) should have 2) I _______revised more for the exam. I was lazy, and now I'll fail! a) could have b) should have c) might have 3) Sarah looked very happy. She  _______ passed her driving test. a) should have b) can't have c) must have 4) I didn't know you were going to Phil's party yesterday. You _____ told me! a) can't have b) must have c) should have 5) I can't believe Jim hasn't arrived yet. He ________ taken the wrong train. a) can have b) must have c) should have 6) I can't believe Jim hasn't arrived yet. He ______ taken the correct train. a) mustn't have b) shouldn't have c) can't have 7) You ________ been ill yesterday. Jessie saw you at the bowling alley. a) couldn't have b) mustn't have c) may not have 8) I don't know where they went but they  ________ gone to Paris or Marseille. a) can have b) must have c) could have 9) You _____ paid more attention. Now we are lost. a) must have b) can't have c) should have 10) The window was broken, so the thieves _______ got in through that window. a) should have b) may have c) must have 11) Mark______gone to buy something new; he has left his wallet and keys on the table. a) could have b) should have c) couldn't have 12) If Iris had had the time, she______gone shopping. Luckily she didn`t have time! a) would have b) must have c) can't have 13) Tomas thinks that Jana ____worn too much make up to the party last night. a) mustn`t have b) shouldn't have c) should have 14) Laura keeps on making the same mistakes ; she _____learnt her lesson by now, but she didn`t. a) might have b) should have c) must have 15) Sienna ______stayed in line at the shop because she`s still not home. a) must have b) should have c) could have 16) Diego______taken such a lovely photograph, if he hadn`t adjusted the lens on his camera. a) would not have b) could have c) shouldn't have 17) Mark passed the exam with flying colors, he _________ studied harder than others. a) should have b) shouldn't have c) must have d) might have 18) Katy failed an exam, she __________ studied harder. a) should have b) shouldn't have c) must have d) could have 19) She _____________ skipped classes if she wanted to pass an exam! a) should have b) must have c) shouldn't have d) might have 20) You see, the class is empty, and the exam day is tomorrow, not today, so you ______________.  a) needn't have come b) should have come c) must have come d) didn't need to come.  21) I _______________ answer because there were other students who wanted to tell that information. a) should have b) needn't have c) didn't need to d) must

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