问题
选择题
______ a good result,the professor decided to do the experiment once more.
A.Not getting
B.Getting not
C.Not having got
D.Having not got
答案
答案:C
考查非谓语动词。逻辑主语the professor,与have之间为主动关系,故用现在分词,根据句意用其完成式,否定应放在分词前。句意:没有得到好的结果,教授决定再次做这个实验。