Помогите пожалуйста если не трудно 13. Sam really ___ to pay more attention during lessons. a)ought b)should c)might14. You ___ expect me to know everything!a)have to b)can't c)must15. You ___ to use your mobile phone on an aer...

Помогите пожалуйста если не трудно  13. Sam really ___ to pay more attention during lessons.  a)ought b)should c)might 14. You ___ expect me to know everything! a)have to b)can't c)must 15. You ___ to use your mobile phone on an aeroplane. a)aren't allowed b)can't c)don't have 16. Let's ask Eleanor - she ___ know. a)can b)shouldn't c)might 17. I ___ see you later if I finish work on time. a)can't b)might c)must 18. He ___ to get there before we do. a) is bound b)must c)is able 19. ___ attend the meeting? a) Must I b)Do I have to c)Am I 20. You ___ pay for the hotel room. Your company has already paid. a)can't b)don't have to c)mustn't