V. Chọn đáp án đúng nhất a, b, c hoặc d. (Choose the best answer a, b, c or d.) 1. They don’t want to withdraw more money unless they _______. a. had to b. have to c. should d. can 2. Cars _______ park in front of the entrance. a. mustn’t b. must c. have to d. should 3. You _______ wear shorts in a pagoda. a. should b. must c. don’t have to d. shouldn’t 4. I don’t think we _______ keep the man without reason. a. must b. don’t have to c. should d. have to 5. You _______ follow the instructions exactly, or you can’t just jump a step ahead. a. have to b. can c. mustn’t d. don’t have to 6. Eric _______ meet us tomorrow. He must work. a. should b. could c. has to d. can’t 7. You _______ touch that switch. It’s very dangerous. a. must b. mustn’t c. should d. can 8. I _______ get up early tomorrow. I have lots to do. a. shouldn’t b. mustn’t c. must d. could 9. You _______ talk to her about anything - she’s very open-minded. a. can b. couldn’t c. have to d. shouldn’t 10. We could use paper cups, so we _______ wash anything. a. shouldn’t b. must c. can’t d. don’t have to