A shopkeeper found a dog in his shop. It had a _1_ in its mouth that read, "Can I have two kilos of meat, please?"
In the dog's mouth there was also a ten-dollar bill(钞票). The shopkeeper felt very _2_, so he took the money, put the
meat in a bag, put the bag in the dog's mouth, and then _3_ it.
     The dog walked down the street. _4_ it came to a crossing(十字路口), it waited for the lights to turn _5_, and then
walked across the road.
     Soon the dog got to a _6_.  It looked at the timetable, and then it sat on a seat to _7_the bus.
     When a bus came, the dog walked to the front of the bus, looked at the __8__of the bus, and went back to its seat.
Another bus came. The dog went and looked at the number again, and then __9_.
     The bus traveled out of the town. __10__the dog stood up to push the button to stop the bus.
     The shopkeeper walked after the dog to a house. It __11__the bag and hit itself against the door again and again! A
man opened the door and shouted at the dog __12__, "What are you doing?" the shopkeeper __13__the man. "This
dog is a genius!"
     The man answered, "Clever? __14__! This is the second time this week it's forgotten its __15__!