问题补充:
all the required papers. he didn answer the questions fluently in class.
A. Having not read
B. Not having read
C. Not read
D. Not to read
答案:
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。