He obtained a copy of his family register at the city hall.

This area is rich in bedded cupriferous iron sulphide deposits.

He is researching on the pathogenesis and treatment of early-onset diabetes.

I was watching the setting sun in the park.

He used sonar to explore the seabed.

Every night, he starts working at midnight.

The inside of the train was crowded.

We have a duty to pay taxes.

The children are playing in the sandpit.

He called himself an anarchist and was opposed to the authority of the government.