15. She is extremely (know) about the history of art. 16. Traveling in big cities is becoming more and more (trouble) every day. 17. The trouble with Mr. Brown is that he's so (consist). One minute he goes mad when you come late; the next he says nothing. You never know where you are!

1. She is extremely (know) about the history of art
2. Traveling in big cities is becoming more and more (trouble) every day 
3. The trouble with Mr. Brown is that he's so (consist). One minute he goes mad when you come late; the next he says nothing. You never know where you are!
4. I didn't know who is was - with a mask on she was completely (recongnise)