all the required papers, he didn’t answer the questions fluently in class．
A. Having not read
B. Not having read
C. Not read
D. Not to read
网友回答
A. Having not read
(答案→)B. Not having read
C. Not read
D. Not to read
解析：考查现在分词的完成式的否定式，Not having done表示动作先于主句的动作发生，句意是：没有读完所有的要求的试卷他在课堂上不能流利的回答问题。选B