He insisted that he_____that and that he_____free.A.didn't do:was set B.hasn't dong:is setC.hadn't done:be setD.hadn't dong :should set选什么?为什么?

问题描述:

He insisted that he_____that and that he_____free.
A.didn't do:was set
B.hasn't dong:is set
C.hadn't done:be set
D.hadn't dong :should set
选什么?为什么?

选D 过去完成时