1) I __________________ up late, but I went to bed early. (possibility) a) could have stayed b) would have stayed c) should have stayed 2) I ___________ arrived earlier. The traffic was terrible. (hypothetical) a) shouldn't have b) couldn't have c) wouldn't have 3) John ________ harder, but he was too lazy. (possibiility) a) shouldn't have studied b) wouldn't have studied c) could have studied 4) I am so tired... I __________ to bed earlier last night!  (strongest regret) a) should have gone b) should have went c) couldn't have gone 5) I have a terrible backache... I ________ carried those heavy boxes! (strong regret) a) could have b) wouldn't have c) shouldn't have 6) It's 10 o'clock. They __________ arrived in Paris by now. (possibility) a) could have b) should have c) shouldn't have d) might have 7) I __________ studied with you, but you didn't ask me. (hypothetical) a) would have  b) couldn't have c) shouldn't have 8) I ___________ in the party, but I didn't know you were there too. (hypothetical) a) would have meet b) would have met c) wouldn't have met 9) My mom ____________ that car if she had enough money. (hypothetical) a) couldn't have buyed b) wouldn't have bought c) would have bought 10) He ____________ better grades, but he didn't. (missed opportunity) a) could have gotten b) would have get c) should have got

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