◎ 题干
They often spend an hour _____ our lessons every afternoon. 
[     ]
A. do                    
B. to do                
C. doing                
D. to doing
◎ 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“They often spend an hour _____ our lessons every afternoon.[ ]A. doB. to do C. doingD. to doing…”主要考查了你对  【动名词】  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。