We ___supper when the policeman came to the door.

问题描述:

We ___supper when the policeman came to the door.
A.just have had
B.have just had
C.had had just
D.had just had
请问这道题应该如何分析 翻译和答案分别是什么

D just 放助动词之后,实意动词之前