The next morning a notice was put up on the door of the workhouse, offering a reward to w

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(答案→)A. whoever
B. no matter who
C. whomever
D. who
解析：句意：第二天早上，一个通知张贴在济贫院的门口，任何人如果愿意雇佣Oliver Twist的都可以得到酬劳。to为介词，后是宾语从句，whoever在从句中做主语，相当于anyone who。B引导让步状语从句；whomever做宾语。who谁，特指。故选A。 
考点: 考查疑问词的用法。