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

--- Mr. Green, I think physics is too difficult for me. ---Tom, work hard, _______ you’ll find it not as difficult.

Money is important ____________ it’s not the most important thing.

 Across from my home, ______ a shop which sells things from foreign countries.

My father was reading a book ________ I was doing my homework.