◎ 题干
—Excuse me, what's this for?
—It's a cleaner and it _       to pick up dirt.
[     ]
A. uses                                
B. is used
C. is using                        
D. used
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Excuse me, what's this for?—It's a cleaner and it _ to pick up dirt.[ ]A. uses B. is usedC. is using D. used…”主要考查了你对  【被动语态】【一般现在时】  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。