◎ 题干
To keep our classroom clean, please                waste paper whenever you see it.
[     ]
A. take up        
B. pick up        
C. put up        
D. send up
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“To keep our classroom clean, please waste paper whenever you see it.[ ]A. take upB. pick up C. put upD. send up…”主要考查了你对  【动词短语】  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。