Write must/mustn't/had to/don't need to. 1 the restaurant won't be busy tonight. a table 2 i was very busy last week. every evening 3 i want to know what happened. me 4 sue what happened. i don't want her to know. 5 or i'll be late. 6 "why were you so late? " " half an hour for a bus" 7 now. we can decide later. 8 it's lisa's birthday next week. to buy her a present !