John promised his doctor he not smoke, and he has smoked ever since.
A. might
B. should
C. could
D. Would.
网友回答
A. might
B. should
C. could
(答案→)D. Would.
解析:考查情态动词的用法,特别是 could 和would 的意义区别。 Could, can 的过去式,主要表示“能够,可以,推测”等意义,而would 表示“将,愿意”,根据题干的意义(约翰向医生许诺将不吸烟,而且从那以后就没有再吸烟。),故选择D。