Choose the word or phrase that best completes each sentence below. 21. You __________ be selfish like that. Don’t just think of your own benefits. A. should B. shouldn’t C. haven’t to D. don’t have to 22. My car broke down yesterday, so I __________ go to work by bus. A. had to B. must C. should D. could 23. Linh _________ hurry because the meeting was 15 minutes late. A. hasn’t to B. hadn’t to C. doesn’t have to D. didn’t have to 24. Leave early so that you _______ miss the train. A. didn’t B. won’t C. shouldn’t D. mustn’t 25. You __________ talk loudly in public as it is impolite. A. shouldn’t B. hadn’t better C. had better not D. Both A & C 26. You _________ fly to London this afternoon if you don’t mind changing planes in Paris. A. must B. have to C. can D. ought to 27. There are many mistakes in this exercise. I _________ go over it again. A. will have to B. am able to C. would D. could 28. _________ I open the door for you? A. Would you like that B. Do you want that C. Will D. Shall 29. There’s the waitress. I ___________ ask her for the hill. A. will B. shall C. am able to D. could 30. His eyesight was so poor that he _________ read the signposts. A. Shouldn’t B. Hadn’t to C. Couldn’t D. Can’t