In the time of Queen Victoria, cholera, a deadly disease, hit London, which often resulted in large numbers of {#blank#}1{#/blank#}(dead). John Snow, a then well-known doctor, became{#blank#}2{#/blank#}(inspire) when he thought about helping ordinary people who {#blank#}3{#/blank#}(expose) to cholera. John Snow thought {#blank#}4{#/blank#}most important was to find its cause. He got interested in two theories {#blank#}5{#/blank#}(explain) how cholera killed people. He believed in the second theory{#blank#}6{#/blank#}suggested people absorbed the disease with their meals. He began to gather information and made a map, on which he marked {#blank#}7{#/blank#}the victims(受害者)had lived. As a result, he found out that the {#blank#}8{#/blank#}(pollute)water was the cause of cholera and suggested that the source of all water supplies{#blank#}9{#/blank#}(examine)immediately. Finally, “King Cholera”{#blank#}10{#/blank#} (defeat).

—Yes, {#blank#}1{#/blank#}.

    As populations increased in large cities in {#blank#}1{#/blank#} nineteenth century, building subway lines was a way {#blank#}2{#/blank#}(move) people from one area of a city to another quickly and efficiently. The first major subway system, the London Underground, {#blank#}3{#/blank#}(start) in 1873 using steam trains. Subways caught on quickly in London. From 1896, it was changed in favor of an electrical system. Today's subways around the world now work on {#blank#}4{#/blank#}(electrical). Passengers can rely on the regular schedule of subway trains while {#blank#}5{#/blank#}(avoid) traffic on busy city streets.

    Two of the world's earliest subways were built in Paris and New York. When the Paris Metro opened on July 19, 1900, citizens were proud of the {#blank#}6{#/blank#}(impress) and beautifully decorated station entrances.{#blank#}7{#/blank#} the first New York subway consisted {#blank#}8{#/blank#} only 14.5 kilometers of track in 1904, today, it is the world's largest subway system.

    Today, subways are still popular with passengers. The Tokyo subway is the {#blank#}9{#/blank#}(busy) in the world, with 3.2 billion riders a year. Close behind {#blank#}10{#/blank#}(be) subways in Moscow(2.4 billion), Seoul (2.1 billion), and New York City (1.6 billion).

    My mom was a nurse and often took me along to visit the {#blank#}1{#/blank#}（family） she was caring for, including one who had a series of strokes （中风） and was bedridden. One afternoon Mom told me that we needed to visit the woman {#blank#}2{#/blank#}（give）her medications, and that we would stop at a store {#blank#}3{#/blank#} the way. I thought we would stop at a drugstore, but we pulled up to a shopping mall.

    My mom {#blank#}4{#/blank#}（head） to the perfume（香水）counter and bought the most expensive bottle they offered. She also bought a beautiful nightdress. When I asked her who they were for, she said they were for her patient. She {#blank#}5{#/blank#}（far） explained although this woman was old and bedridden, she was still a lady, and {#blank#}6{#/blank#} old deserved to be treated with respect and grace. When {#blank#}7{#/blank#} （care） for someone, we should look past the disability or the illness and look into the soul of the human, so we can connect them with sympathy. I soon realized that my mom's greatest {#blank#}8{#/blank#}（strong）was taking care of those who cannot advocate for {#blank#}9{#/blank#}（they） and need trustworthy care providers. That's {#blank#}10{#/blank#} I wanted to become a doctor.