If you don't have regular dental check-ups, you may develop periodontitis.

The saber-toothed tiger is a type of extinct mammal.

He was wrapping the present.

He was plucking flowers in the garden.

I saw a flock of sheep on the top of the mountain.

He was singing to himself alone in the room.

Unable to bear the pain, he had no choice but to scream.

The house over there is very big.

Mr. Hiruma is my best friend.

Well, let's get started!