the plane had taken off when we arrived at the airport.这句话对吗?怎么翻译 那么将had变成has可以吗？

When he reached the airport,his friend’s plane ______.A:took off B:had taken on C:had taken abroad D:had already taken off By the time he got to the airport,the plane had taken off.改为一般疑问句 The plane had __ when we arrived at the airport.A taken off B taken away C taken to D taken on When she got to the a__,the plane had taken off (2/3)e told the plane ( ) ,A,had taken off B,put off C,was taken of Don't you smoke until the plane __ off.A takes B took C has taken D had taken Don't you smoke until the plane __ off.A takes B took C has taken D had taken The plane had taken off when i reached the airport改为同义句The plane_____off______I reached the airport. 2.By the time he got to the airport,the plane had taken off.（改一般疑问） He was caught in a traffic jam and by the time he reached the airport his friend's plane ( ).A.has alread taken off B.had already taken off C.has been taken offD.had been taken off I arrive at the airport ——the plane had taken off.A:after B:whileC:whenD:before I arrived at the airport ____ the plane had taken offA.after B.while C.before D.when The plane ___ when we got to the airport A.had taken off B.was taken off C.is taking of选哪个 为什么 （ ）I arrived at the airport______the plane had taken off.A.after B.that C.when D.before the plane had taken off when we arrived at the airport.这句话对吗?怎么翻译 那么将had变成has可以吗？ 是I've never taken the plane before 还是I had never taken the plane before.希望能说明理由,假设我是第一次乘飞机,并且此刻我正坐在飞机上对我旁边的人说这一句话 When he hurried to the airport,the plane had-- 急!A.taken down B.taken off 请说明还是说一下好了，老师说选taken down 我不知道为什么...明天考是 快啊 The plane before they the airportThe plane____before they___the airportA.had taken off...reached B.has taken off...reachedC.took off...had reached D.was taking off...have reached不及物动词(短语)无被动语态,排除D 接下来怎么选