This quiz works best with JavaScript enabled. Home > English Grammar > 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) Must not have thought. B) Shouldn't have thought. C) Wouldn't have think. D) Should have think. Show Answer Correct Answer: A) Must not have thought. 2. I ..... more for the exam. I was lazy, and now I'll fail! A) Could have study. B) Would have study. C) Should have studied. D) Couldn't have studied. Show Answer Correct Answer: C) Should have studied. 3. Tim's supposed to be here, but it looks like he ..... A) Couldn't have forget. B) May have forgotten. C) Shouldn't have forgotten. D) Would have forgot. Show Answer Correct Answer: B) May have forgotten. 4. Matt ..... college in 1997. He was only 14 years old. A) Must not have graduate. B) May not have graduated. C) Couldn't have graduated. D) Might not have graduate. Show Answer Correct Answer: C) Couldn't have graduated. 5. The window was broken, so the thieves ..... got in through that window. A) Mustn't have. B) Must have. C) Shouldn't have. D) Should have. Show Answer Correct Answer: B) 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) Must have gone. B) Should have went. C) Shouldn't have go. D) Couldn't have gone. Show Answer Correct Answer: A) 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) Might have. B) Would have. C) Wouldn't have. D) Should have. Show Answer Correct Answer: A) Might have. 10. I can't believe Jim hasn't arrived yet. He ..... the correct train. A) Couldn't have taken. B) Should have took. C) Could have take. D) Must 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) Must have been. B) Should have be. C) Couldn't have seen. D) Might have feel. Show Answer Correct Answer: A) Must have been. 12. We really enjoyed the movie. You ..... with us. A) Might have came. B) Can't have come. C) Should have come. D) Must have came. Show Answer Correct Answer: C) Should have come. 13. Do you think we ..... the economic crisis if we had taken greater precaution? A) Should have avoiding. B) Could have avoided. C) Might not have avoid. D) Must have avoid. Show Answer Correct Answer: B) Could have avoided. 14. John ..... at the party last night. He's not even in the country. He flew to Japan yesterday morning. A) Might not have be. B) Shouldn't have been. C) May not have be. D) Couldn't have been. Show Answer Correct Answer: D) Couldn't have been. 15. He studied nothing and passed the exam, so he ..... cheated. A) Must have. B) Shouldn't have. C) Can't have. D) Should have. Show Answer Correct Answer: A) Must have. 16. I'm not completely convinced of his innocence. I think he ..... been involved. A) Must have. B) Might have. C) Should have. D) Must not have. Show Answer Correct Answer: B) Might have. 17. I'm not a fan of their logo. I think they ..... it years ago. A) Could have written. B) Must have known. C) Should have changed. D) Would have spoken. Show Answer Correct Answer: C) 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) Should have mention. B) Could have mention. C) Would have mentioned. D) Shouldn't have mentioned. Show Answer Correct Answer: D) Shouldn't have mentioned. 19. Nobody knows exactly why he died. But we think it ..... been an accident. A) Might have. B) Can have. C) Should have. D) Can. Show Answer Correct Answer: A) Might have. 20. Sarah looked very happy. She ..... passed her driving test. A) Can. B) May have. C) Must have. D) Could have. Show Answer Correct Answer: C) Must have. 21. They said they were going to pick us up at 7 p.m. I think they ..... somewhere else! A) Should have go. B) Must not have gone. C) Would have went. D) May have. Show Answer Correct Answer: D) May have. 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