Răspuns:
1. Mark doesn't need to buy new clothes for the reception.
2. You must not pick these flowers.
3. Sarah has to type her compositions at university.
4. Paula didn't need to make the beds.
5. You must obey the law.
6. Bob didn't need to wait for me, but he did.
7., 8 nu au cuvintele
9. Alice didn't need to bake a cake for the party.
10. George didn't have to stay at work late last night, but he did.