He was waiting for me at the door.

Mr. Koguchi is my best friend.

Mr. Kiguchi is my best friend.

The exit to get off the bus is at the back.

Mr. Deguchi is my best friend.

Taniguchi is my best friend.

I have been to Yantai.

Due to the fire, black smoke was billowing in the sky.

He threw a smoke bomb to obstruct the enemy's view.

Due to the fire, there was thick smoke everywhere.