It is difficult for us to learn a lesson in life we’ve actually had that lesson.Aunti

问题补充：

It is difficult for us to learn a lesson in life we’ve actually had that lesson.

Auntil

B. after

C. since

D. when

答案：

(答案→)A. until

B. after

C. since

D. when

解析：句意：在我们的生命中，直到我们真正经历那一课才会学会那一课。Until直到 ……才after在…… 之后since自从when当…… 时候，可知选A。