Choose the correct answers A, B, C, or D to complete the following sentences

If you want to maintain a healthy weight, you _________ have snacks between meals.
1. shouldn't
2. should
3. must
4. don't have to
I __________ strictly follow the doctor’s instructions if I want to get better quickly.
1. shouldn't
2. must
3. can
4. don't have to
The government ___________ improve the infrastructure of big cities to boost the economy.
1. mustn’t
2. doesn't have to
3. should
4. didn‘t have to
People living in high-rise buildings ___________ obey the safety rules and regulations strictly.
1. shouldn't
2. mustn't
3. may
4. have to
Lots of women in the past _____ stay at home, look after their children, and do all housework.
1. must
2. should
3. had to
4. have to
My parents respect my career choice, so I __________ follow in their footsteps.
1. mustn’t
2. don’t have to
3. should
4. shouldn't