the task we had just completed proved to be more difficult than _____.为什么填expected?expected 是什么成分 怎么分析它的语法成分

the task we had just completed proved to be more difficult than _____.为什么填expected?expected 是什么成分 怎么分析它的语法成分 we ( ) our breakfast when an old man came came to the doorA.just have had B.just had C.have just had D.had just had We _ our breakfast when the old woman came to the door A;just habe had B;had iust had C;just hadD;have just had 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 大学英语四级语法一题（53）We ___ our breakfast when an old man came to the door .A just have had B have just had C just had D had just had 53. We _D_ our breakfast when an old man came to the door.A just have had B have just had C just had D had just had为什么不选B? All the preparations for the task _____,and we're ready to start.A.completed B.complete C.had been completed D.have been completed All the preparations for the task ________ and we’re ready.to start.A.completed B.complete C.had been completed D.have been completed 英语翻译The man with whom we had a talk just now isn't in the gym. it is necessary that we ___ fulfill the task in a week's time a.should.b.would.c.had to d.might 应该选哪个?为什么? 英语翻译Just when she had reached the most important point we were cut off. we had just taken our seats ,then comes the chairman解释下then ,倒装 we just had to show our passports and they let us get on the boat.翻译 We have time enough to finnsh the task.改错 We need_____(addition)effort to fullfill the task. The goods______when we arrived at the airport.A.The goods______when we arrived at the airport.A.were just unloading B.were just been unload C.were just being unloaded D.had just unload we were lucky that we had just escaped being caught in the rain 为什么要用 being caught in? We our breakfast when an old man came to the door.We B our breakfast when an old man came to the door.A have just had B had just had