1)
Does she usually take the bus to school?
Does she usually take the bus or the tram to school?
She usually takes the bus to school, doesn't she?
What means of transport does she usually take to school?
Who usually takes the bus to school?
2)
Is he dancing with Mary now?
Is he dancing with Mary or with Ann now?
He is dancing with Mary now, isn't he?
Who(m) is he dancing with now?
Who is dancing with Mary now?