EF Int/4B: Have to, must, should

Complete with the correct form of have to (+, -, or ?)

I ... call back later because the line is engaged. (+)

Complete with the correct form of have to (+, -, or ?)

Passenegrs ... switch off their laptops during take-off. (+)

Complete with the correct form of have to (+, -, or ?)

(you) ... do a lot of homework when you were at school? (?)

Complete with the correct form of have to (+, -, or ?)

My sister is a nurse, so some weeks she ... work nights. (+)

Complete with the correct form of have to (+, -, or ?)

(you ever) ... have an operation? (?)

Complete with the correct form of have to (+, -, or ?)

Saturdays are the best days of the week. I love ... get up early. (-)

Complete with the correct form of have to (+, -, or ?)

I ... leave a message on her voicemail because she wasn't in. (+)

Complete with the correct form of have to (+, -, or ?)

In the future, people ... go to school; they'll all study at home. (-)

Complete with the correct form of have to (+, -, or ?)

With old mobile phones, you used to ... charge the battery more often. (+)

Complete with the correct form of have to (+, -, or ?)

(your boyfriend) ... answer his work emails at weekends? (?)