He was very happy because he met an old friend of his on the road .A、by accident B、by mistake C、by hand
---Doctor , I’m getting ________. --- Well , you’d better eat ______food.
The accident happened _____the old man _____ a cold morning .
This is Mr. Green’s ________visit to America. He has never been there before.
---Are the Smiths living in the house alone ? --- Yes, although they have three sons, _____ of them live with their parents.
Kate has a beautiful _______ . Listen ! She is singing very well.