Выберите правильное слово:
1. Economics is a ... discipline.
a) basic; b) natural; c) social.
2. ... is an applied subject.
a) history; b) accounting; c) economics.
3. Mathematical tools are used in economics ...
a) briefly; b) extensively; c) finally.
4. Like english grammar economics has a few... and principles.
a) rules; b) graphs; c) lines.
5. Every choice involves ...
a) investment; b) cost; c) time