一道英语题（虚拟语气）——Wouldyouhavecalledheruphaditbeenpossible.——Yes,butIbusydoingmyhomework.A.wasB.wereC.hadbeenD.wouldbe答案：A,请翻译并解释,谢谢咯

Question

一道英语题（虚拟语气）
——Would you have called her up had it been possible.
——Yes,but I _____ busy doing my homework.
A.was B.were C.had been D.would be
【答案：A,请翻译并解释,谢谢咯】

Answer 1

这个以前有人解释过：选A.因为问句是与过去事实相反的非真实条件句：Would you have called her up had it been possible?=If it had been possible,would you have called her up?; 如果当时可以的话,你会打电话把她叫起来么?（不是说叫醒她,而是她在睡觉把她吵醒）答句：Yes,说明会的.但是后一句又有关键词：but,说明：but后不是虚拟语气,是当时的真实情况.