This area is rich in bedded cupriferous iron sulphide deposits.

Please teach me how to calculate the area of this circular sector.

That terrifying character scared the children.

Kei's birthday party was filled with everyone's jubilation.

He taught me Japanese.

This room is very cramped.

This road is very narrow.

He was behaving as if he was crazy.

He and I compete in tennis every week.

I was amazed at his new idea.