He is a very serious student.

I know this is sudden, but could you arrange a time for me to meet with the president?

From the mugwort window of my room, a landscape of fresh green mugwort spreads out.

We looked at the sea from the window in the small boat with a thatch roof.

The view from the airplane window is very beautiful.

He opened the window to let fresh air into the room.

She put a vase on the windowsill.

There are two windows in this room.

There is a large French window in my room.

He is good at saying tongue-twisters.