The key to exercise solutions in chapter 0.7 - Sport for the textbook Focus 2 - Student's Book with authors Daniel Brayshaw, Sue Kay and Vaughan Jones from Pearson Education
Question
Rewrite the sentences using should, shouldn’t, mustn't or have to.
Answer
have to be very heavy.
mustn't enter the dohyo (or sumo ring).
should eat around 20,000 calories a day.
mustn't speak
have to throw salt into the ring at the beginning of a match