To her delight,the professor ____at last A referring to coming B referring to came
问题描述：
To her delight,the professor ____at last A referring to coming B referring to came
C who referred to came D referred to came
答
D 令她高兴的是,那位被提及到的教授最后来了.
句子主干是这样的：the professor came at last.referred to是过去分词做定语 ,相当于 who was referred to ,修饰前面的professor .为什么用came？？过去时啊