1 My neighbourhood has really been built up.

2 The country built up a stockpile of strategic metals.

3 A huge backlog of work had built up.

4 Noxious gases had built up in the sewer.

5 He built up a reputation as a tough businessman.

6 You have built up a huge property empire by buying from wretched people who had to sell or starve.

7 She has built up an enviable reputation as a harpist.

8 She had built up a protective shell of indifference around herself.

9 Tension built up as the crisis approached.

10 The area has been built up since I moved.

11 The team built up an impregnable 5-1 lead.

12 Their products were built up everywhere.

13 The show has built up a cult following.

14 She's built up a very successful business.

15 The tension and excitement built up gradually all day.

16 The team has now built up a commanding lead.

17 We have built up our hope.

18 She built up my confidence.

19 The regime built up the largest army in Africa.

20 We built up the business from nothing.

21 He has built up a not inconsiderable business empire.

22 She has built up an impressive collection of paintings.

23 The museum has built up a fine art collection.

24 They built up the product by advertising.

25 She went for dance and built up her health.

26 The weightlifting built up his body.

27 One team has already built up a commanding lead.

28 We've built up good relationships with our clients.

29 The tension between the two countries built up to a climax.

30 Harriet has built up quite a reputation for herself as a reporter.