问题

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

A:until
B:after
C:since
D:when

正确答案是：

同类题型

. — I didn’t do well in the last Englishcontest. How about you— ____.

That is the day _____ I’ll never forget. [ ]

What are the rules at your school- Don’t run in the hallways and ______ arrive late for class.

Does he go foreverymorning

I was very busy that day. Otherwise I _________in the discussion. [ ]