The American Civil War lasted four years the North won in the end.
29. When I met him last year in Beijing, he was busy ___________ a new job.
28. You have done wrong to Jack, _____you should say sorry to him.
27. That’s the woman one of __________ daughters works as an engineer in the US.
26.The house I grew up______has been taken down and replaced by an office building.
25. For many cities in the world, there is no room to spread out further, _____New York is an example.