7 Rewrite the sentences using should, shouldn't, mustn't or have to.
1 It is necessary for sumo wrestlers to be very
heavy.
Sumo wrestlers
2 If you're a woman, don't enter the dohyo
(or sumo ring).
Women
3 It's a good idea for a sumo wrestler to eat
around 20,000 calories a day
Surno wrestlers
4 When you watch a sumo training session,
don't speak.
When you watch a sumo training session, you
5 It is necessary for sumo wrestlers to throw salt
into the ring at the beginning of a match.
Sumo wrestlers
6 It isn't a good idea for sumo wrestlers to
show their feelings.
Sumo wrestlers