This is a simple idea, but that is hard to put into practice.A. one B. it C. that D. those 题目和参考答案——青夏教育精英家教网—

题目内容

This is a simple idea, but that is hard to put into practice.

A. one B. it C. that D. those

【解析】

试题分析：考查代词的用法。这里的one是代词，one代替前面出现的 a simple idea，是泛指概念，相当于a+名词。One同时后面that引导的定语从句的先行词。句意：这是一个简单的想法，但是它很难付诸实践。

考点：考察代词用法。

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