You _____ respect older people. You can learn some valuable lessons from them.

• must

• mustn’t

We ______ wear uniforms on weekdays. It’s the rule at our school.

• don’t have to

• have to

You ______ ask your parents for permission if you want to colour your hair.

• should

• mustn’t

In the past, women_______ do all housework. It was one of their duties.

• had to

• must

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

• should

• mustn't

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

• mustn't

• don't have to

My grandparents live in the suburbs, so whenever we visit them, we _____ take a bus.

• must

• have to

 I ____ stay overnight at my friends' house. My parents are very strict about this.

• don't have to

• mustn't

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

• shouldn't

• should

She _____ stay at home to look after her children because there is no one to help her.

• must

• has to