1. I failed my exam. I _____ harder., A. should study, B. should have studied, C. must study, D. shouldn't have studied, 2. You _____ so much food! We've already eaten., A. didn't need to cook, B. needn't have cooked, C. should cook, D. had to cook, 3. We _____ take a taxi yesterday because the buses weren't running., A. should have, B. had to, C. needn't have, D. didn't have to, 4. She _____ him that secret. Now everyone knows!, A. should have told, B. had to tell, C. shouldn't have told, D. needn't tell, 5. I _____ buy a ticket because my friend had a spare one, so I didn't., A. needn't have, B. shouldn't have, C. had to, D. didn't need to, 6. He _____ checked the weather forecast before going hiking. He got caught in a storm., A. ought to have, B. ought to, C. had to have, D. needn't have, 7. I _____ my umbrella. It didn't rain, but I carried it all day., A. didn't need to take, B. had to take, C. needn't have taken, D. should have taken, 8. You _____ so rude to the waiter yesterday., A. shouldn't be, B. shouldn't have been, C. needn't be, D. didn't have to be, 9. The museum was free, so we _____ pay for tickets., A. needn't have, B. shouldn't have, C. didn't have to, D. ought not to have, 10. I _____ her advice. Everything went wrong because I ignored it., A. should have followed, B. should follow, C. needn't have followed, D. had to follow, 11. We _____ leave the party early because my sister wasn't feeling well., A. needn't have, B. didn't have to, C. should have, D. had to, 12. You _____ me a present! That's so kind of you, but it wasn't necessary., A. didn't need to buy, B. needn't have bought, C. shouldn't buy, D. had to buy

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