Mr. Green is an American doctor. He {#blank#}1{#/blank#} (be) a doctor since 1996. He is busy every day and {#blank#}2{#/blank#} (have) little time to rest, but he {#blank#}3{#/blank#} (love) his job.

    It was a cold winter evening. While he {#blank#}4{#/blank#} (read), his telephone call ringed. Mr. Green received a phone call from a woman. She said she needed the doctor's help. Mr. Green decided {#blank#}5{#/blank#} (drive) to the town she lived in right away. It was snowy and there was ice on the road. Suddenly, his car {#blank#}6{#/blank#} (hit) a big tree and turned over. Luckily, he wasn't hurt. He got out of the car and walked to the nearest house. He wanted some help. The door of the house {#blank#}7{#/blank#} (open) by a young woman. To his surprise, she was the patient who had just called him up.

    Bridges are built for many reasons. Some bridges are built so that cars can cross over rivers. {#blank#}1{#/blank#} are made for trains to use.  In Washington State, there is a very {#blank#}2{#/blank#} (usual) bridge. It was built for squirrels(松鼠). The town of Longview has a very busy street. Many cars pass {#blank#}3{#/blank#} every day. When squirrels tried to cross the street, they {#blank#}4{#/blank#}(kill).  Amos Peters wanted {#blank#}5{#/blank#}  (protect) these small and lovely animals, so he built a bridge for them--one that would let them pass above the traffic.

    The bridge {#blank#}6{#/blank#} (be) a symbol of the town for over 40 years since then. And every Christmas, the local people add a small Christmas tree to the centre of the bridge. {#blank#}7{#/blank#} lovely!

    A few years ago, the local people created {#blank#}8{#/blank#} squirrel festival and they raised money {#blank#}9{#/blank#} (build) two more bridges for these lovely animals. For years, because of the bridges, the squirrels in the town have been able to cross {#blank#}10{#/blank#} (safe) from one side of the street to the other.