1.so expert,indeed,that he attended Queen Victoria as her personal physician,so。。 that 句型2.when he thought about helping ordinary people 。when引导的状语从句3.ordinary people exposed to cholera。exposed to cholera过去分词作定语4Neither its cause nor its cure was understood. neither。。。nor 既不也不5 that cholera would never be controlled 宾语从句6 until its cause was found until引导的状语从句