Though Mandela﹙曼德拉﹚____ 27 years in prison﹙监狱﹚, he thought it meaningful.

I’m curious to know ______ it is ______ has made Anne_____ she is today.

I failed in the final examination last term and only then _______ the importance of studies.

oks as if they are going to ____ us, dollars for the concert hall

can’t finish the book in less thanan hour, I suppose—_______. I’ll return it to you on time.