We threw a party to celebrate his success.

My friends threw a party to celebrate the completion of my novel.

I was finally able to complete writing my thesis.

When he opened the window, fresh air flowed into the room.

When he opened the window, fresh air flowed into the room.

The door opens.

He had to undergo surgery for rectal prolapse.

My friends threw a party to celebrate the completion of my novel.

I finally finished writing my novel.

He is my best friend.