◎ 题干
The old man sat in front of the television every evening, happy ___ anything that happened to be on.
[     ]
A. to watch
B. watching  
C. watched    
D. to have watched
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“The old man sat in front of the television every evening, happy ___ anything that happened to be on.[ ]A. to watchB. watchingC. watchedD. to have watched…”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。