it was not necessary, ----for the aircraft to wait any longer

问题描述:

it was not necessary, ----for the aircraft to wait any longer
A at all b after allc above all d in all
空格处选择at all 比较好吧 ,与前面的not 否定,加强语气,对吗.

是.如果necessary后没有那个逗号就更好理解了.