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

Opening mikhail lomonosov enriched many branches of knowledge . developed atomic-molecular representation of the structure of matter . during the rule of the caloric theory maintained that heat due to the motion of corpuscles . formulated the principle of conservation of matter and motion. foreclosed phlogiston number of chemical agents. laid the foundations of physical chemistry. researched atmospheric electricity and gravity. color theory put forward . created a number of optical devices. opened to the atmosphere venere.mihail lomonosov was born november 19, 1711 in the village denisovka ( now the village lomonosovo ) family of pomorie. at age 19, went to study ( from 1731 to the slavic-greek -latin academy in moscow, from 1735 at the academic university in st. petersburg , in 1736-41 in germany). since 1742 associate , 1745 academician of the petersburg academy of sciences .