Question

the correct option.
1 I’m not sure where Jane is. She could / must be at the office.
2 Sally has to / doesn’t have to pass all her exams because she wants to go to university.
3 You ought to / can check you have all the ingredients before you start making the cake.
4 The letter should / couldn’t arrive tomorrow. It was sent by express delivery.
5 You mustn’t / have to book the tickets soon, otherwise they’ll be sold out!
6 You don’t have to / mustn’t smoke at a petrol station. You can’t / could cause an explosion.
7 That painting is obviously a forgery. It mustn’t / can’t be by Van

Answer 1

1-could
2-has to
3-ought to
4-should
5-have
6-mustn’t,could
7-can’t