英语造句……急~用expert,attended,physician,exposed to,cure,challenge

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  • John Snow was a famous doctor in London-so expert,indeed,that he attended Queen Vitoria as her personal physiciann.But he became inspired when he thought about helping ordinary people exposed to cholera.This was deadly disease of its day.Neither its cause nor its cure was understood.So many thousands of terrified people died every time there was an outbreak .John Snow wanted to face the challenge and solve this problem.He knew that cholera would never be controlled until its cause was found.不知道啥意思.百度上找的 .