1. My friend Liz watches both new films and old ones, she is a great cinema lover.
2. The old part of the town is situated on one bank of the river and the new one on the other one.
3. We always try to buy fresh vegetables, nobody wants old or spoiled ones.
4. This tea is cold, I hate cold tea.
5. Their telephone number has been changed and i don know their new one.
6. They say that to eat dark chocolate is healthier than to eat milk chocolate.
7. Everyone knows that gold rings are more expensive than silver ones.
8. Of all my friends I prefer those who have the same interests as me (в этом предложении нельзя вставить ни one, ни ones, но я бы убрала friends после those)