the experiment right, I tried again and succeeded.
A. Not having done
B. Having not done
C. Not doing
D. Not done
网友回答
(答案→)A. Not having done
B. Having not done
C. Not doing
D. Not done
解析：考查非谓语动词用法。I与do构成主动关系，根据句意可知没有做到对实验是在我再次尝试之前就发生的，所以使用完成式。句意：因为没有做好实验，我再试了一次，成功了。