—_____is your mother ? —A nurse. She works in a hospital. 

--There             so many foreigners in the streets these days.-- They might be runners in the Yellow River Estuary (入海口，河口) International Marathon.

Although he was will,          his father came back.

Something was wrong with the computer . I had no choice ____ to wait.

I don’t like bread. I won’t eat it_____________ I am much too hungry.