A.A friend of his gave him the tickets as a present. B.A friend of his sold him these two tickets. C.He got the tickets free from charge from 'Pepsi'. D.He bought the tickets at a 'black ticket market'.
【单选题】When I reach the school grounds there are lots of 'good mornings' _____ me _____ the boys, many _____ whom have walked a long way, sometimes up _____ two hours, to get to the school. [ ]