A. Having not given enough time B. Having not been given enough time C. Not having been given enough time D. Not having given enough time 参考答案:C 答案解析:[题解] 这里是现在分词短语做原因状语。应该注意几点:1.分词的否定形式和其他的非谓语否定形式一样,均须将否定词放在句首。2.根据分词的逻辑主语来判断分词用主动形式还是被动形式。3.还要根据动作的先后