My friend Mr walker is an able doctor and has a hospital .So

My friend Mr. walker is an able doctor and has a hospital．So he has enough money to travel 1all over the world．And he's been to a lot of places of interest．He likes to play with the children and has a lot of little friends ．They often ask him to tell them all kinds of funny（滑稽的）things he read． It makes them happy and his room is always full of children when he's free． It was my little son's seventh birthday yesterday．The boy insisted on（坚持）asking his old friend Mr. Walker to the party ．He called Mr. Walker himself and told him about it．The joker received his invitation（邀请）happily．At half past seven the boy was waiting for his coming at the gate．As soon as he saw his car，he ran towards him．Mr. Walker came on time，with a nice present in his hand．After dinner the children sat around the travelerdoctor and asked him to tell them some funny stories．Mr. Walker agreed and his stories made them laugh again and again．At last he told them the funniest story．He said，“One day I reached a city on a foggy（雾的）day．The fog was the thickest in the world’’ “Please wait a minute ，Mr. Walker，”said my son．“It's said the fog in London is the thickest in the world．” “You're right，my boy，”said the funny man．“But the city had much fog that day．” “What's it．then?’’ “The fog was so thick that I couldn't see it at all，”the joker said with a smile． 这是另一个版本 http://wenku.baidu.com/view/3a86df0eba1aa8114431d953.html