◎ 题干
Do you think it's important____   for teenagers?        
[     ]
A. exercising    
B. exercise    
C. to exercise
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Do you think it's important____ for teenagers? [ ]A. exercisingB. exerciseC. to exercise…”主要考查了你对  【不定式】  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。