◎ 题干
There____many people____in the office, but now nobody is allowed to.
[     ]
A.used to be;smoking    
B. used to have ; smoking    
C. used to be;smoke    
D. used to have ; smoke
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“There____many people____in the office, but now nobody is allowed to.[ ]A.used to be;smokingB. used to have ; smokingC. used to be;smokeD. used to have ;…”主要考查了你对  【现在分词】【therebe句型】  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。