One.morning,'a London boy (36).............sitting in the bus onhis way to school. He was sniffing (37)... ..the time and making (38)... ..a noise with his (39)... ... that the other people in the bus began to (40)..........their heads. At last an old man (41).. ....was sitting next to him said: "Little boy, (42). ....you got a handkerchief?, '"Yes, I've got a clean (43).. ....in my pockef" said the boy, "But I can't let (44). ..have it.My mother says it's not polite to ask anybody (45)... ..a handkerchief. You must have and use your own" (Mn điền từ vào chỗ ... giúp em với ạ)