◎ 题干
Large quantities of water _________ into the machine to cool it down.   
[     ]
A. are pouring
B. is pouring
C. is being poured
D. are being poured
◎ 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“Large quantities of water _________ into the machine to cool it down.[ ]A. are pouring B. is pouring C. is being poured D. are being poured …”主要考查了你对  【现在进行时的被动语态】【主谓一致】  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。