◎ 题干
After the break, the lecturer went on to talk ______ about the new academic concept.
[     ]
A. at length      
B. in all        
C. in turn    
D. at most
◎ 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“After the break, the lecturer went on to talk ______ about the new academic concept. [ ]A. at length B. in allC. in turnD. at most…”主要考查了你对  【介词和介词短语】  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。