31.   And now, more than two years after the blast, the authorities can still only speculate about a precise motive and who financed the plot.

32.   And that leads one to speculate about the callers.

33.   And they are proceeding so quickly that experts can only speculate about how many students are taking courses online.

34.   And we have no business speculating about her feelings for her husband.

35.   Anyway, why speculate about potential trouble and ruin a nice story?

36.   Archivists speculate about several intriguing ideas for making a broader selection of vintage TV available to the general public.

37.   Artists, theologians and laity have speculated about the place of eternal life throughout history.

38.   As he sat under the tree of the much abused and abusive white crowned sparrow, Baptista speculated about an ancient question.

39.   Bank stock analysts and traders in distressed securities have speculated about other potential problem loans that could hit Bank of America, First Union and other lenders.

40.   Bartlett was among several people who speculated about how long a honeymoon between Kirk and his council colleagues might last.