This market is in a state of duopoly by two large companies.

He works at a large company.

I'm worried about his health condition.

She had two apples.

He buys fresh vegetables at the local market every Saturday.

He buys fresh vegetables at the local market every weekend.

My father works at a large enterprise.

I have a doubles match in tennis today.

He has a diplocultural background.

It takes time to solve this complex problem.