When we were children, we _______ tidy our rooms before we could watch TV.
A. must
B. had to
C. have to
D. should
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Now I have a good salary, I ________ worry about paying the rent.
A. mustn’t
B. have to
C. don’t have to
D. must to not
Which sentence has the strongest obligation?
A. I have to call my mum because it’s her birthday.
B. I ought to call my mum because it's her birthday.
C. I should call my mum because it's her birthday.
D. I could call my mum because it's her birthday
You ______ use a video camera to record films while you are in the cinema. It’s illegal.
A. oughtn’t to
B. can’t
C. shouldn’t
D. don’t have to
For us, the ideal house ________ have three bedrooms but it________ have a big kitchen. Kitchens aren’t very important for us as we rarely cook.
A. must, mustn’t
B. should, shouldn’t
C. can, can’t
D. has to, doesn’t have to