题目

完型填空4A tramp (流浪汉) was sleeping on a park bench late at night. A man and a woman were walking l . One of them tapped him 2 and asked, “ 3 . What's the time?” The tramp was very angry 4 . “I don't know!” he said angrily. “I haven't got a watch.” And he went back to sleep.5 later another man was passing. He woke the tramp up and said, “I am sorry to bother you, but I 6 if you could tell me 7 .” Again the tramp said he 8 . By now he was very fed up (厌烦之极) , so he got a pen and a piece of paper and wrote I DON'T KNOW WHAT THE TIME IS on it and went ba将0.5千克：15吨 化成最简整数比为1：4001：400．