◎ 题干
To make our city more beautiful, rubbish _      _ into the river.          
[     ]
A. needn't be thrown        
B. mustn't be thrown          
C. can't throw
◎ 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“To make our city more beautiful, rubbish __ into the river.[ ]A. needn't be thrownB. mustn't be thrown C. can't throw…”主要考查了你对  【情态动词】【被动语态】  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。