◎ 题干
—What are people supposed to do when they meet ________the first time?        
—They are supposed to bow.        
[     ]
A. on        
B. at        
C. for        
D. to
◎ 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“—What are people supposed to do when they meet ________the first time? —They are supposed to bow. [ ]A. onB. at C. for D. to…”主要考查了你对  【介词】  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。