I'm a Muslim, so I fast during Ramadan.

I'm Jewish.

Her family adopts a matriarchy.

The United Kingdom is a constitutional monarchy.

Oligarchy is a political system where a few powerful people rule the country.

Proportional representation is an important system to ensure the fairness of elections.

He is doing special exercises to strengthen his depressor muscle.

Primitive communism is one of the initial forms of human social organization.

Japan has introduced an import quota system to protect domestic industries.

When my stomach hurts, I always take an antacid.