Vul het juiste vraagwoord in; who, what, where etc.

.. was that boy you kept in yesterday ?
... language is easier, French or German ?
... colour is her hair ?
... of these young lads is your boyfriend, Doris ?
... car is this ? Is it your dad’s, Brian ?
... river runs through York ?
... of these 2 girls is most beautiful ?
... swimming trunks are these ?
... told you to shut up ?
... will you finally do your homework ?
... pen is this ? Is it yours ?
... book did you read ? The horror book or the detective story ?  
... did you see at the party? I saw my aunt.
... sort of films do you like ? I like action films.
... wrote this book ?