HELP
What or Which?

1) is my pen, this black one or this red one?
2) doctor did you visit - Dr. Smith or Dr. Pitt?
3) do we need to take for the picnic?
4) music do you like?
5) kind of films do you like - horror films or thrillers?
6) is your favourite sport?
7) time is it when you leave school?
8) is her name?
9) of those books is yours?
10) house is it - No. 12 or No. 13?