Angličtina - but, however, although, on the other hand

Prosím nevíte máme věty spojit But, however, Although , On the other hand
1. Jeans were very popular. People only wore them as work clothes.
2. Stone, wood and metal are natural materials. Plastic is not.
3. The Romans conquered all of sourthern Britain. They never conquered Scotland.
4. Otzi was only forty-six years old. That was old for someone in the Stone Age.

Prosím chápu to ale k první větě mi jde but however athough a takhle to mám u všech vět pls nevím si rady