问题补充:
at failing in the maths exam, John wouldn like to talk about it to his parents.
A. Disappointing
B. Having disappointed
C. Disappointed
D. To be disappointed
答案:
A. Disappointing
B. Having disappointed
(答案→)C. Disappointed
D. To be disappointed
解析:考查非谓语动词。be disappointed at sth/doing sth因某事而感到失望,disappointed是形容词化的过去分词,类似的还有worried, interested, lost, absorbed等,根据句意可知,是发生过的事情,而不定式表将来,排除D,故选C。