this is one of the most interesting question that -----asked.A have B has C have been D has been

问题描述:

this is one of the most interesting question that -----asked.A have B has C have been D has been

c

选C
1、因为是asked 所以肯定是have/has
2.that 后面省略了,如果不省略的话应该是I have been asked.
主语是I 所以用have,被问,所以用have been done.