they ___supper when we___into the rooma.are having.wentb.were having..goc.were having...wentd.are having...go

they ___supper when we___into the rooma.are having.wentb.were having..goc.were having...wentd.are having...go 汉译英 他们开始做晚饭了 They ___ ___supper now. We ___supper when the policeman came to the door.A.just have had B.have just hadC.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 When they were When are they when are they going? when they are born When do they get When do they leave? They cannot see when they are born They must remember when they __(begin). when will they, when they will的区别和用法 when they will retire还是when they retire When do they come home? When do they like camping? oh when they were young when are they going中文 when they g_______ to Shanghai