The flight would take off at 11 o'clock but it wasn't yet nine o'clock ____ Danny arrived at the airport.A.until B.while C.when D.before为什么不可以选A?

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Theflightwouldtakeoffat11o''clockbutitwasn''tyetnineo''clock____Dannyarrivedattheairport.A.untilB.while

The flight would take off at 11 o'clock but it wasn't yet nine o'clock ____ Danny arrived at the airport.A.until B.while C.when D.before为什么不可以选A?
The flight would take off at 11 o'clock but it wasn't yet nine o'clock ____ Danny arrived at the airport.
A.until B.while C.when D.before
为什么不可以选A?

The flight would take off at 11 o'clock but it wasn't yet nine o'clock ____ Danny arrived at the airport.A.until B.while C.when D.before为什么不可以选A?
航班是十一点起飞,丹尼到机场时是九点,它还没起飞.until是直到...才,用until意为直到丹尼到时飞机才起飞,而实际上丹尼到了飞机都要再过两个小时才起飞,意思不对.WHEN比较恰当