We spent hours driving and another few hours waiting, only that the plane would be delaye

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(答案→)A. to be told
B. having told
C. to have been told
D. told
解析：考查不定式用法。only to do sth. 的意思是“不料，竟然”；C选项是不定式的完成式，表示动作发生在谓语动词之前。句意：我们开车好几个小时，又等了好几个小时，结果却被告知飞机被延误到半夜。故A正确。