The experiment has ( )at last

问题描述:

The experiment has ( )at last
A succeeded B fail
C tried D made

这个空要填一个不及物动词,因为空后面再没有宾语了,所以CD排除,又因为has后面应该跟动词的过去分词形式,所以B不可取,只能选A!A填进去,意思也通,所以它是正确的.