Choose the correct answer

1. My grandparents live in the suburb. Therefore, whenever we visit them, wea bus.
A. must take                B. should take         C. have to be taken          D. have to take
2. Youeat plenty of fruit or vegetables every day because they are good for your health.
A. oughtn't to             B. mustn't                 C. don't have to                D. should
3. Youuse your mobile phone in the exam.
A. oughtn't to              B. mustn't                 C. don't have to                D. shouldn't
4. I think youdo exercise regularly in order to keep in shape.
A. must            B. should                C. ought to                  D. Both B and C are correct
5. The childrenspend too much time watching TV.
A. mustn't             B. ought to not             C. shouldn't           D. Both B and c are correct