1. You have been reading for four hours. This book ___ be very interesting. A. can B. might C. must D. should 2. Don’t phone Ann now. She ___ be having lunch. A. might B. can C. must D. has to 3. This road is very narrow. It ___to be widened. A. might B. needs C. mustn’t D. may 4. They have plenty of time, so they needn’t ___. A. be hurry B. to hurry C. hurry D. to be hurried 5. You’re having a sore throat. You’d better___ to the doctor. A. to go B. went C. go D. going 6. My mother permitted me to go out at night. She said, “You ___ go out tonight.” A. may B. have to C. must D. ought to 7. He advised me to take an English course. I ___ it early. A. should have taken B. should take C. will have taken D. may take 8. You ___ ring the bell; I have a key. A. mustn’t B. needn’t C. couldn’t D. shouldn’t 9. It must ___ without delay. A. be done B. have been done C. do D. be doing 10. By the time a baby has reached his first birthday, he should ___ sit up or even stand up. A. to be able to B. able to C. to be able D. be able to 11. Many birds will ___ more than 3,000 miles to reach their winter homes. A. flying B. fly C. be fly D. flew 12. The pen won’t write; It ___ out of ink. A. must run B. must be running C. must have run D. must have ran 13. The line is busy; someone ___ the telephone now. A. must be using B. must have used C. must useD. must have been using 14. She told me that she’d rather ___ on the committee. A. not to serve B. not serving C. not serve D. serving not 15. “Are you still going to Florida for vacation?” “Yes, but I really ___because I don’t have much money.” A. shouldn’t B. can’t C. mustn’t D. won’t 16. “Did Peter go downtown by car or by train?” “He ___by train because his car was in the mechanics.” A. must go B. has to go C. had gone D. must have gone 17. “Why are you so mad?” “You ___ me you weren’t coming to dinner. I waited for you for two hours.” A. should tell B. should have told C. should told D. should had told 18. “Do you like to play tennis?” “I ___, but now I prefer golf” A. used to B. used to do C. used to played D. used to playing 19. “Have you seen Kate?” “No, but she ___ be at her desk.” A. may B. ought C. would D. can 20. “Can I borrow twenty dollars?” “No, you know I ___ lend you money any more.” A. might not B. shouldn’t have C. won’t D. not going to giúp em vs ạ