问题补充:
Charlie Chaplin, for life was hard, went to the USA to earn his life when he was young.
A. whose
B. who
C. whom
D. his
答案:
A. whose
B. who
(答案→)C. whom
D. his
解析:通过分析句子结构,可知这个句子中包含一个由介词 + 关系代词引导的定语从句,直接位于介词之后的关系代词只能是which,whom或whose,构成介词+which(指物);介词+whom/whose(指人)两种结构,故排除B和D,这里关系代词作介词for的宾语,故选C。