11.   The control arm of the study was carefully designed, choosing a virgin girl among relatives to retain, as far as possible, a similar genetic background.

12.   Although she and her character Godiva have similar backgrounds, Nelson says the novel is not autobiographical.

13.   Among people who have similar genetic backgrounds, DNA samples should be so similar that disease mutations will stick out like sore thumbs.

14.   Although the rivals sprang from similar backgrounds, they have followed different paths in life.

15.   Among all the secretaries of states stretching back to Thomas Jefferson, the first, only Henry Kissinger had a similar background, and he was far better known.

16.   And he points out that a lot of other people who make horror films have similar backgrounds.

17.   And there is no known difference in dropout rates between those in bilingual classes and those of similar background studying only in English.

18.   Boeing plans a similar background briefing for the media before the safety board meets.

19.   A drawing, from two years earlier, of a European kitchen maid returning from the market had used a similar background.

20.   All were white, and they had similar backgrounds.