It was a very foggy day in London Mr. Smith from Edinburgh arrived to go to a very important meeting，but no buses or taxis were running because the drivers 64 （be not） able to see more than a yard in front of them．It was nine o’clock，and his meeting was at ten，so he wanted to walk to the meeting．But when he looked out into the street，he saw nobody 65
（walk）in the street．
While he 66 （stand）there，a young man came up to him and said，“Sir，If you want to go somewhere，I 67（guide）you．”
Mr. Smith was very surprised and said，“How can you find the wav when there is thick fog everywhere?”
“Do not worry，sir，”answered the young man．“Trust me．”So Mr. Smith told the young man where he wanted to go，took his arm，and they started．They walked quite fast， 68 （turn）corners and crossing roads in various places．At last the young man stopped and said “Here is the place．sir．’’Mr. Smith was surprised 69（find）that he really reached the office he was looking for．He gave the young man a pound and then said．”How did you find the way in the fog?
“I'm blind，sir，”answered the young man．‘‘I 70（1ive）in London for 20 years，so I know London well，and it is exactly same for me in the fog．”