John Snow was a famous doctor in London — so expert that he attended Queen Victoria as her personal physician. But he became inspired when he thought about helping ordinary people {#blank#}1{#/blank#} (expose) to cholera,{#blank#}2{#/blank#}  was the deadly disease of its day. Neither its cause nor its cure was understood. So many thousands of terrified people died whenever there was {#blank#}3{#/blank#}outbreak. John Snow wanted to face the challenge and solve this problem. He knew that cholera would never {#blank#}4{#/blank#}(control) until its cause was found.

    He became interested in two theories that {#blank#}5{#/blank#}(possible) explained how cholera killed people. The first suggested that cholera multiplied in the air. A cloud of dangerous gas floated around until it found its victims. The second suggested that people absorbed this disease {#blank#}6{#/blank#} their bodies with their meals. From the stomach the disease quickly attacked the body and soon the {#blank#}7{#/blank#}(affect) people died. He suspected the second theory was correct {#blank#}8{#/blank#} he needed evidence.

    So when another outbreak hit London in 1854, he was ready to begin his {#blank#}9{#/blank#}(enquire). As the disease spread quickly through poor neighborhoods, he began to gather information. In two particular streets, the cholera outbreak was so severe that more than 500 people died in ten days. He determined {#blank#}10{#/blank#}(find) out why.

我从未想到你可以成功说服他改变想法。

    One day, Nick invited his friends to supper. He was cooking some delicious food in the kitchen .Suddenly, he {#blank#}1{#/blank#}（find）that he had run out of salt. So Nick called to his son," Go to the Village and buy some salt, but pay a fair price for it: neither too much {#blank#}2{#/blank#} too little."

    His son looked surprised. "I can understand why I shouldn't pay too much, Father, but if I can pay less,{#blank#}3{#/blank#} not save a bit of money?"

    "That would be a very {#blank#}4{#/blank#}（reason）thing to do in a big city, but it could destroy a small village like ours," Nick said.

    Nick's guests,{#blank#}5{#/blank#} had heard their conversation, asked why they should not buy salt more cheaply if they could. Nick replied," The only reason a man would sell salt {#blank#}6{#/blank#} a lower price would be because he was desperate for money. And anyone who took advantage of that situation would be showing a lack of respect {#blank#}7{#/blank#}the sweat and struggle of the man who worked very hard to produce it."

    "But such a small thing couldn't {#blank#}8{#/blank#}（possible）destroy a village."

    "In the beginning, there was only {#blank#}9{#/blank#}very small amount of unfairness in the world, but everyone added a little ,always {#blank#}10{#/blank#}（think）that it was only small and not very important ,and look where we have ended up today."

    For thousands of years, doctors {#blank#}1{#/blank#} (recognize) that childbirth can have a big effect on a woman's mind and body. Many women experience a time of sadness {#blank#}2{#/blank#} they give birth to a baby. This is called the baby blues, or postnatal depression.

    Doctors do not know the exact cause of postnatal depression. But they believe that an imbalance of brain chemicals {#blank#}3{#/blank#} (be) probably the cause. Hormones are {#blank#}4{#/blank#} (nature) body chemicals. They affect a person's emotions. Immediately after pregnancy, a woman's hormone {#blank#}5{#/blank#} (level) change a lot. So, a woman's emotions and ways of thinking also change a lot.

    Other brain chemicals also influence the way a person feels. They {#blank#}6{#/blank#} (physical) affect the brain. They make a person feel depressed. There are ways to fix and balance these brain chemicals.

    Some medicines, {#blank#}7{#/blank#} (call) anti-depressants, can help to treat postnatal depression. But these medicines may cost a lot of money. And not all people can get them. However, there are ways that women may be able to treat and recover from these sicknesses without medicine.

    If you are a new mother {#blank#}8{#/blank#} (suffer) from the baby blues or postnatal depression you should know that you are not alone. Other women have had {#blank#}9{#/blank#} same experiences. They have lived to have happy and healthy lives. If you are a husband, friend, or family member of a new mother, you should know that you can help! You can support the new mother. You can share the information {#blank#}10{#/blank#} her. You can help her find hope.