Каковы причины образования государства на руси? 

Нужно определить модальный глагол, который соответствует смыслу предложения. 1. i didn't ...to get up carty , so i didn't -ought -should -need -must 2.Jack ...go to hospital yesterday -must -has to -had to -should 3.you look tired . you ...go to bed -must -could -should -would 4.if you want to become a teacher, you ...go to teachers training college for four years -should must may have to 5Jane was so tired . she ...have stept for a week -must -could -should -would 6what shall we do this evening ? we ...go out -should -ought to -could -would 7she ...help you tomorrow -could -is able to -will be able to -will can 8where is Nick ? he ...be in his office -might -ought to -should -would 9i ...rather stay at home than go out -shall -must -would -could 10hello, ..i speak to Tom , please? -can -will -would -shall 11 you ...have left your purse in the shop -should -ought to -could -shall 12he is tembly fat . He ...eat too much -should -mustn't -can't would

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какова скорость движения автомобиля, если его колеса радиусом 30 см делают 600 оборотов в минуту?