Выберете подходящее слово.

1. At school I didn’t study the (economy, economics) of Great Britain.
2. I hope he’ll make a good (economist, economy).
3. There are many (economic, economical) problems in the world.
4. This car is very (economic, economical).
5. I try to spend money and time (economical, economically).
6. This car (economize, economizes) fuel.