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：句意：没有读要求看的试卷，他在课堂上不能流利的回答。这里需要非谓语动词做原因状语，因为是先没有读，然后才不能流利回答，所以用现在分词的完成式，而且否定词not放在having前面，所以选B。