31.   Bush, who continues to make promoting reading her main theme as first lady, plans to attend the Texas Book Festival this year, too.

32.   But his main theme was re-establishing a spiritual base in this country.

33.   But many of these bills strain against the main themes of his candidacy.

34.   But literature is the main theme.

35.   But the main theme is culture shock.

36.   But the main theme was the most important of all.

37.   But the main theme that emerged from the data was how quickly Japan is growing old.

38.   But the survey of exploration takes up so much space that the main theme seems to get short shrift.

39.   Clinton now sends out word that the columnist compacted some of the nuances, but all the evidence indicates that Wattenberg got the main themes right.

40.   Ethnic politics has become a main theme.