He was singing to himself alone in the room.

He is good at playing the harmonica.

He is a very talkative person, always continuing to talk.

He gave her a kiss.

I have been to Haikou.

He kissed her hand in an archaic manner.

He pointed the muzzle of the gun at the enemy.

He finally confessed to the police.

I have an oral exam tomorrow.

Where is the ventilation opening in this room?