No bread eaten by man is as good as got by his own labor. A. one B. that C. it D. those

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A. one
(答案→)B. that
C. it
D. those
解析： 考查代词用法。此处为同级比较代替上句的bread故用that代替上句出现的不可数名词。One指同类的一个，it指同一个；those代替上句的可数名词复数形式。