Complete the sentences using “should / shouldn’t,  “must / mustn’t, have to / has to” or “don’t / doesn’t have to”.

You

stare at the computer screen for too long. It is really bad for your eyesight.

Choose the best answer.

I ______ stay overnight at my friend’s house. My parents are very strict about this.

Choose the best answer.

Your grandparents live far from you, so you  _______ talk to them on the phone regularly.

Choose the best answer.

You _____ stay up at night, which is not good for your health.

Choose the best answer.

I ______ go home now to finish my homework.

Choose the best answer.

Your grandparents live far from you, so you  _______ talk to them on the phone regularly.

Choose the best answer.

I can watch TV and play computer games on Sunday because I _____ go to school that day.

Choose the best answer.

I ______ stay overnight at my friend’s house. My parents are very strict about this.