To be a surfing instructor, I ........... be a strong swimmer., should, must, mustn't, don't have to, We ........... obey the rules at school., must, have to, need to, should, We ........................ go to school today. It's Saturday., shouldn't, mustn't, don't have to, They ............ wear a school uniform., has to, don't have to, have to, should, He really .............. study harder for his exams or he will fail them., has to, must, should, Students ............ cheat during exams., mustn't, shouldn't, don't have to, He ............ get a degree to be a helicopter pilot., has to, have to, doesn't have to, should, Oh, you definitely ......... read this book. It 's really exciting!, have to, must, should, You ....... apply for the course. It sounds interesting!, shouldn't, should, must, have to, James wants to be an actor. He ............ get a degree, but he can get one if he wants to., must, should, doesn't have to, mustn't, You .............. go to bed so late. You need to sleep well, should, shouldn't, not should, mustn't, You ............... complete all the obstacles to get a gold, silver o bronze medal., must, have to, don't have to, should, You ............ train to be a nurse, it doesn't depend on you., should, don't need to, have to, Tom ............. study foreign languages., shouldn't, doesn't have to, mustn't, Sarah .............. pass her exams to get into college., have to, should, has to

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