As we know, people who can't see anything live difficult lives. They may have{#blank#}1{#/blank#}(苦恼)in going out. Also, they feel {#blank#}2{#/blank#}(寂寞)when they stay at home alone. Can people save these problems?

    In 1918, a doctor and his pet dog walked with a {#blank#}3{#/blank#}(眼瞎的) soldier. The doctor had something to do in the hospital, so he left his pet dog and the soldier for a short time. When he came back, he {#blank#}4{#/blank#}(注意到)his pet dog guided the soldier safely. So he made a {#blank#}5{#/blank#}(决定)that he would teach dogs to guide persons and he succeeded at last. This made the people who can't see {#blank#}6{#/blank#}(兴奋的).

    The best dogs for the job are clever. It takes more than two years to {#blank#}7{#/blank#}(训练) a little dog to be a guide-dog. When the dog is 14 months old, it can understand people's instructions(指令) easily. Then it will meet its new {#blank#}8{#/blank#} (主人)and they need to practice together for four weeks. With the help of the guide-dog, the disabled people become {#blank#}9{#/blank#}(独立). They never {#blank#}10{#/blank#} (依靠)on others.