The art club is for members only. You can’t go in _________ you are a member.

   _______   I  know,  he  is  kind.

I was just falling asleep ____ there was a loud knock at the door.

—You look rather tired. _______stop to take a rest？—All right. But I’ll have to work for a few more minutes.

____ they are very tired, they feel happy because they’re finally finished their project.