21.   Different groups give different explanations for the drop.

22.   Historians like George Grote had found different explanations for the centrality of the polis.

23.   It could only mean one thing, participants on both sides of the case will say, advancing different explanations with equal fervor.

24.   It seemed to be obvious, although the Celtics would provide a different explanation later.

25.   Joseph offered a different explanation.

26.   John Dasburg, the president of Northwest Airlines, had a different explanation for why investors soured on transportation stocks.

27.   Leetch had a different explanation.

28.   Many different explanations have been suggested.

29.   More startling, it seemed everyone had a different explanation for what happened.

30.   NBC had a different explanation.