题目内容

all the required papers, he didn’t answer the questions fluently in class．
A．Having not readB．Not having read
C．Not readD．Not to read
B

试题分析：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
点评：分词做状语的情况还要考虑做状语的动作和主句的动作发生的先后，如果同时发生就用现在分词的一般式，如果先于主句的动作就用完成式，如果是否定式，not放在最前面.
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