Complete the sentences. to(2), in(2), at(3),by 1) this picture is valentin serov, my favourite painter. 2) do you often go the theatre ? 3) my good friend and i are interested painting. 4) his sister is very good drawing. 5) the say there's a new ballet this opera house. 6) there's a good collection of puppets this museum. 7) the boy made his new picture pencil. 8) how important you is your hobby ?

1) This picture is ...by  Valentin Serov, my favourite painter. 
2) Do you often go ...to the theatre ? 
3) My good friend and I are interested ...in painting.
4) His sister is very good ...at drawing.
5) The say there's a new ballet ...at this opera house.
6) There's a good collection of puppets ...at this museum.
7) The boy made his new picture ...in pencil.
8) How important ...to you is your hobby ?