Fill in the gaps with the correct form of obligation, according to the rules.
1) Yesterday, we had to
go to the Natural History Museum.
2) Every I have to practice the piano.
3) Do they have to to do the exam again?
4) My mum told me that I should
go and see my grandma as she is not feeling well.
5) When you arrive at a hotel you must
sign the register.
6) You should read the book if you want to find out
what it is about (suggestion).
7) What time do you have to go to school?
8) They had to leave early to catch the train.
9) Guests mustn´t use any electrical appliance
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