What - what are you doing?, which - which is your favourite sport, when - when is your birthday?, where - where is your pet?, who? - who is your mother?, whose - whose cellphone is that? , whom - whom will they choose for the job?
What - what are you doing?, which - which is your favourite sport, when - when is your birthday?, where - where is your pet?, who? - who is your mother?, whose - whose cellphone is that? , whom - whom will they choose for the job?