Read the sentences and choose the correct options

Решение:

1. You must touch this animal. It is very dangerous.
2. You must be polite with elderly people.
3. You must brush your teeth twice a day.
4. You must tidy your room at least once a week.
5. You must walk alone late in the evening.
6. You mustn't drink unfiltered water.
7. You must wash all fruits