This quiz works best with JavaScript enabled. Home > Grammar > Parts Of Speech > Adverbs > Degree Of Certainty – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Degree Of Certainty Quiz 1 (21 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. He didn't even smile at my jokes. He ..... they were funny. A) Shouldn't have thought. B) Wouldn't have think. C) Must not have thought. D) Should have think. Show Answer Correct Answer: C) Must not have thought. 2. I ..... more for the exam. I was lazy, and now I'll fail! A) Should have studied. B) Would have study. C) Could have study. D) Couldn't have studied. Show Answer Correct Answer: A) Should have studied. 3. Tim's supposed to be here, but it looks like he ..... A) May have forgotten. B) Would have forgot. C) Couldn't have forget. D) Shouldn't have forgotten. Show Answer Correct Answer: A) May have forgotten. 4. Matt ..... college in 1997. He was only 14 years old. A) May not have graduated. B) Might not have graduate. C) Must not have graduate. D) Couldn't have graduated. Show Answer Correct Answer: D) Couldn't have graduated. 5. The window was broken, so the thieves ..... got in through that window. A) Should have. B) Shouldn't have. C) Must have. D) Mustn't have. Show Answer Correct Answer: C) Must have. 6. Which is stronger A) Their findings will probably cause a stir in scientific circles. B) Their findings will certainly cause a stir in scientific circles. C) All the above. D) None of the above. Show Answer Correct Answer: B) Their findings will certainly cause a stir in scientific circles. 7. I've phoned Jim several times, but he doesn't answer. He ..... out. A) Shouldn't have go. B) Couldn't have gone. C) Must have gone. D) Should have went. Show Answer Correct Answer: C) Must have gone. 8. Which is weaker? A) The Government must regulate against cartel membership if insider trading is to be avoided. B) The Government should consider regulating against cartel membership if insider trading is to be avoided. C) All the above. D) None of the above. Show Answer Correct Answer: B) The Government should consider regulating against cartel membership if insider trading is to be avoided. 9. The investigators have several ideas about what ..... caused the fire. A) Should have. B) Might have. C) Would have. D) Wouldn't have. Show Answer Correct Answer: B) Might have. 10. I can't believe Jim hasn't arrived yet. He ..... the correct train. A) Couldn't have taken. B) Could have take. C) Must have took. D) Should have took. Show Answer Correct Answer: A) Couldn't have taken. 11. I can't believe you met Steve Jobs in person. That ..... amazing! A) Should have be. B) Must have been. C) Couldn't have seen. D) Might have feel. Show Answer Correct Answer: B) Must have been. 12. We really enjoyed the movie. You ..... with us. A) Might have came. B) Can't have come. C) Must have came. D) Should have come. Show Answer Correct Answer: D) Should have come. 13. Do you think we ..... the economic crisis if we had taken greater precaution? A) Should have avoiding. B) Might not have avoid. C) Could have avoided. D) Must have avoid. Show Answer Correct Answer: C) Could have avoided. 14. John ..... at the party last night. He's not even in the country. He flew to Japan yesterday morning. A) Couldn't have been. B) May not have be. C) Might not have be. D) Shouldn't have been. Show Answer Correct Answer: A) Couldn't have been. 15. He studied nothing and passed the exam, so he ..... cheated. A) Can't have. B) Must have. C) Should have. D) Shouldn't have. Show Answer Correct Answer: B) Must have. 16. I'm not completely convinced of his innocence. I think he ..... been involved. A) Must have. B) Should have. C) Might have. D) Must not have. Show Answer Correct Answer: C) Might have. 17. I'm not a fan of their logo. I think they ..... it years ago. A) Could have written. B) Would have spoken. C) Must have known. D) Should have changed. Show Answer Correct Answer: D) Should have changed. 18. You ..... it in front of the rest of the people. I would have talked to him in private about it. A) Shouldn't have mentioned. B) Should have mention. C) Would have mentioned. D) Could have mention. Show Answer Correct Answer: A) Shouldn't have mentioned. 19. Nobody knows exactly why he died. But we think it ..... been an accident. A) Can have. B) Might have. C) Should have. D) Can. Show Answer Correct Answer: B) Might have. 20. Sarah looked very happy. She ..... passed her driving test. A) May have. B) Could have. C) Can. D) Must have. Show Answer Correct Answer: D) Must have. 21. They said they were going to pick us up at 7 p.m. I think they ..... somewhere else! A) Must not have gone. B) Should have go. C) May have. D) Would have went. Show Answer Correct Answer: C) May have. 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