◎ 题干
The doctor is now very busy, many patients are waiting _______outside his office.
[     ]
A. to examine      
B. to be examining      
C. to be examined    
D. examination
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The doctor is now very busy, many patients are waiting _______outside his office.[ ]A. to examine B. to be examiningC. to be examinedD. examination…”主要考查了你对  【不定式的被动式】  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。