My keys are inside the house.

He is quite a good cook.

I think his Japanese has improved quite a bit, hasn't it?

I am busy with work during the daytime.

He is working at a construction site.

His research covers a wide range of topics.

The chord progression of this song is very unique.

The speed of this progressive wave is close to the speed of light.

There is a planned blackout tonight, so please come home early.

He is systematically advancing his work.