15．Mr Black was once a policeman．He was a kind person．He liked to have a walk in the park after breakfast．
It was very cold（31）Ba winter morning．Mr Black was walking along the street when he heard a cry for help．He turned around but could see nobody．He stopped and looked here and there．At the moment，a boy（32）Dto him．The boy was in such a hurry（33）Che couldn't say a word except pointing towards the river．Mr Black realized what had happened and ran to the river as soon as possible．（34）Bof them ran along the river and saw a girl in the water．She（35）Aa piece of wood．It was carrying her away．It was too（36）C．
Without a word，Mr Black took off his clothes as（37）Cas he could，and jumped into the river．He（38）Ato the girl and took her back near the bank and lifted the girl up，and then the boy helped（39）Bher out of the water．Then they stopped a car and took the girl to the（40）D．At last the girl's life was saved，and she thanked them verymuch．
| 31．A．in | B．on | C．at | D．for |
| 32．A．walked up | B．looked out | C．rushed out | D．ran up |
| 33．A．so | B．and | C．that | D．but |
| 34．A．All | B．Both | C．Neither | D．either |
| 35．A．was holding | B．was lifting | C．is taking | D．is pushing |
| 36．A．heavy | B．exciting | C．dangerous | D．interesting |
| 37．A．slowly | B．carefully | C．quickly | D．quietly |
| 38．A．swam | B．ran | C．flew | D．walked |
| 39．A．push | B．pull | C．bring | D．take |
| 40．A．house | B．school | C．park | D．hospital． |
