1) I ______________ call back later because the line's engaged. a) 'll have to b) have to c) had to 2) Passengers ___________ switch off their laptops during take-off. a) do have to b) must have to c) have to 3) ____________ you ____________ do a lot of homework when you were at school? a) Had ... have to b) Did ... have to c) Have ...have to 4) My sister is a nurse, so some weeks she __________ work nights. a) has to b) had to c) have to 5) Saturdays are the best day of the week. I love _________ get up early. a) didn't having to b) not having to c) not have to 6) __________ you ever _________ have an operation? a) Had ... have to b) Did ... had to c) Have ... had to 7) I ____________ leave a message on her voicemail because she wasn't in. a) had to b) have to c) have had to 8) In the future, people ____________ go to school; they'll all study at home. a) didn't have to b) would not have to c) won't have to 9) With old mobile phones, you used to ________ charge the battery more often. a) have not to b) have to c) must to 10) ____________ your boyfriend ___________ answer his work emails at weekends? a) Has ... have to b) Does ... have to c) Have ... have to 11) The exhibition was free, so I __________ pay. a) have to b) don't have to c) don't has to

Unit 4B: Modals of Obligation

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