◎ 题干
When ___ comes to saving energy , big changes start with small steps , like turning off the lights.          
[     ]
A. that  
B. this  
C. it  
D. one
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“When ___ comes to saving energy , big changes start with small steps , like turning off the lights. [ ]A. thatB. this C. it D. one …”主要考查了你对  【人称代词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。