it is difficult for us to learn a lesson in life _____ we've actually had that lesson.A.until B.after C.regular D.when

问题描述:

it is difficult for us to learn a lesson in life _____ we've actually had that lesson.
A.until B.after C.regular D.when

对我们来说,从生活中吸取教训是很难的______实际上我们已经得到教训了.
A吧

这是我们很难汲取教训,在生活中_____ ,其实我们已经有这个教训。

A.until
我们很难从生活中获取经验,直到我们确实经历过.