摘要： Helping others is a habit, you can learn even at an early age. A. it B. that C. what D. one [解析]D.考查同位语从句及代词用法.由句子结构分析可知是一个定语从句.排除what,如果选that.不符合非限定性定语从句的规则.所以应排除,it在句首只能做主语.但后面句子主语是you.所以应排除.one和a habit是同位语结构.同时做后面定语从句的先行词.定语从句的宾语省略.
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Helping others is a habit, _______ you can learn even at an early age.
A. it B. that C. what D. one
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A. it B. that C. one D. those
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