10. In case you're suffered from the injury, you ____ see the doctor today. A. had better B. must C. ought D. have better 11. Water park is free for kids under 6 years old, so you ____ pay money for your son. A. have to B. mustn't C. should D. don't have to 12. You look totally exhausted. You ____ take a rest instead of working overtime. A. should B. ought C. must D. has better 13. My car broke down yesterday, so I ____ catch a taxi to the office A. have to B. had better C. had to D. has to 14. We ____ eat as much fruit as possible in order to get enough vitamins for our bodies. A. had better B. should C. ought to D. All are correct 15. You ____ tell anyone what I've revealed to you. It's still a secret. A. mustn't B. had better not C. ought not to D. don't have to 16. We ____ go to work by car. Sky train is a wise choice during rush hour. A. ought to B. mustn't C. shouldn't D. have t