Idioms in English

Everyone in my family is a teacher, but I decided from a young age that I wanted to be an actor. I guess I've always been the black sheep

My wife asked me if I liked her new dress. Well, I thought it was horrible, but of course I told her it looked wonderful. You have to tell a little white lie from time to time, don't you? 

Everyone in my department is very happy because the project we've been working on for six months has finally been given the green light. 

Most of the people in my town are white-collar workers. There are very few people working in factories. 

I hadn't heard from Jo for almost ten years, so when a letter from her came out of the blue, I was naturally very surprised. 

Have I done something to upset Anne? She's been giving me the cold shoulder