___ it have been wrong directions from the control room that caused the air crash?A. Must B. Could C. Would D. Should 请教各位这题选什么以及为什么.

The room ___ a stale air.It must have been vacant for a long time. It should have been left i have ___ been to Hong Kong. Have you ___ been to Tokyo(never) I would have tole him the answer had it been possible ,but i simply ___ no time A.had,hadB.had been C.had D.would have had there is considered ___ no risk.A.to have been,B,tha it is,C.to having been D.that it was The room is in a terrible mess,it ___ cleane;a、can’t have been b、shouldn’t have beenc、mustn’t have been d、wouldn’t have been ___ they have been working hard to find?Ais that what Bis that Cit is that Dis it that ___ has been announced,we shall have our final exams next monthA.That B.As C.It D.What It is said that anew robot ___ by him in few daysA) desi gned B) bas been designed C) will be designed D) weil have been designed 1.My bike doesn't work.I will ___ this afternoon.A.make it mend B.have it mended C.have it mend D.have it to mend2.Have you ever ___ the Great Wall?A.been to B.gone to C.go to D.been3.We like those who have only one idea but make it ___.A.to work B.w 初中英语单选一道It is one of the TV best plays ___ this year .A they have been watched B that has been watched C that have been watched D which has watched为什么选C不选A 2道高中英语语法题1.___ his warning,we would not have escaped the burning dacing hall.A.Hadn't been for B.Had it not been for C.It hadn't been for D.Had not it been for2.It was in the lab ___ was taken charge of by Prof.Harris ____ they did th Have all the students konw that our class will visit the factoryYes,Every student ___ about it.A.have told B.have been told C.has told D.has been told I have been to Macau before.同义句:I ___ ___ beenI have been to Macau before.同义句:I ___ ___ been to Macau before It Must Have Been Love (Cologne) 歌词 I have been used to it. It Must Have Been Love 歌词