1) All passengers ... wear seat belts. a) must b) should c) don`t have to 2) You ... be an expert to use the basic functions of program. a) ought to not b) must c) don't have to 3) Pupils in this school ________ wear uniform. a) mustn`t b) have to c) should d) has to 4) You ... tell your sister that you are sorry. a) should b) mustn`t c) ought d) has to 5) You _______ drop litter here. It's against the rules! a) don't have to b) shouldn't c) mustn't d) doesn`t have to 6) If you don`t want to go with us, you ... do it. a) should b) doesn`t have to c) must d) don`t have to 7) If you don`t feel well, you ... to go to the doctor. a) must b) should c) ought d) has to 8) The zoo is free today. You _________ pay. a) have to b) mustn't c) shouldn't d) don`t have to 9) You ... talk loudly at the library. a) mustn`t b) shouldn`t c) doesn`t have to d) must 10) You ... cross the road here. It`s the rule. a) doesn`t have to b) mustn`t c) shouldn`t d) don`t has to 11) I ... wear glasses, I still can see perfectly well. a) must b) don't have to c) ought to d) should 12) If you have a toothache, you ... go to the dentist. a) has to b) mustn`t c) should d) ought

Have to/ ought to/ must/ should

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