问题补充:
Though it was very late, they their discussion.
A. continued with
B. went on
C. continued on
D. carried on with
答案:
A. continued with
B. went on
C. continued on
(答案→)D. carried on with
解析:在表示继续这一含义时,carry on 是经营, 从事, 忙于的意思;go on 是 继续 的意思;continue 是连续性的继续。句意:尽管非常晚了,但是他们还是继续他们的讨论。结合语境可知下文含有从事某事的含义,故选D。