3. We should learn vocabulary every day.

4. You should tell the truth to your family.

5. I don't have to wear uniforms every day.

6. We mustn't drive without wearing a helmet.

7. Young people need to plan their future career carefully.

8. You must pay attention to the content of the lesson.

Ex10/

1. Parents don't need/have to satisfy all their children's needs

. 2. You should avoid all junk food.

3. Do I need to show my identification card to process a bank transfer?

4. You shouldn't swear every time you need to emphasize something.

5. In the UK, you mustn't buy or drink alcohol in pubs or shops if you are under 18.