问题

It is human nature to think backto a golden age ______ one’s country was strong andrespected.

A:if
B:when
C:while
D:after

正确答案是：

同类题型

childhood, we were often ________ by Grandma to pay attention to our table manners

Charles did what he could _____ the servant, although he himself was in danger.

Mom, I got the best grade onthe English test today. —Good job, son. I’m ______ofyou.

What is he He is __________.

ilms like Avatar proving__________ in cinemas, many technology experts believe 3D is now set to take over the home market,