21.   The mood shifted, as did the questions.

22.   The mood shifted, too, becoming warmer, more optimistic.

23.   The mood shifts when one of his lieutenants reports on new customers and ribs Brewer about his new short haircut.

24.   The mood was shifting, and presumably fashion would be shifting right along with it.

25.   The mood has shifted.

26.   The mood shifts among haunting, dramatic, and vulnerable.

27.   Then abruptly the mood shifts.

28.   Though no one could be certain that the mood would not shift again just as quickly.

29.   Were that to happen, the mood would shift suddenly, as it has in the US.

30.   When game time arrived, the mood shifted to serious every time Sosa stepped up.