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

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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
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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
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

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
A take off :起飞.没有被动语态,B错 got to the airport 是过去,根据主从句时态的一致性,C错.A叫做:过去完成时,表示在我们 got to the airport 之前,飞机已经起飞了.即:过去的过去

选A,这里要用过去完成时态,表示过去的过去
当我们到达机场时,飞机已经起飞了.

when引导的时间状语从句,飞机起飞发生的时间是在WE到达机场之前发生的。时间是发生在过去的过去,所以用过去完成时,故选择A
希望你能明白,祝你好运。