We sometimes study people from the past and old monuments in ________ class.

Ao Dai is the ___________ costume of Vietnamese people.

He often _________ playing table tennis, but he ________swimming at the moment.

There is a difficult exam tomorrow, ________ I'm revising now.

I love to learn about mountains and rivers. I like__________.

Isaac Newton is a scientific _______. He changed the way we understand the universe.