Which tooth hurts?
Tell me which you want.
Which skirt do you like?
Which club do you belong to?
Which bed do you want to use?
Which credit cards can I use?
Do you know which way to take?
Which airport do I leave from?
Which of them is your brother?
Which subject do you like best?
Which of these rackets is yours?
Which CD do you want to listen to?
Which dictionary did you refer to?
Which season do you like the best?
Which wine goes best with red meat?
Could you tell me which way I should go?
The driver told us which bus we should take.
Which do you like better, apples or bananas?
Which do you prefer, white wine or red wine?
I didn't know for certain which train to take.
She told me which clothes would be good to wear.
Which do you like better, white wine or red wine?
Which air conditioner do you think is the most efficient?
I had trouble deciding which brand of dog food to feed my dog.
I can think of some situations in which a knife would come in handy.