11.   The sudden changes unsettled Judy.

12.   There was a sudden change in the weather.

13.   Wilson waited, not sure how to interpret the sudden change of atmosphere.

14.   Yet the peripheral zone is hypersensitive to sudden change.

15.   Sudden changes by the government can cause terrible trouble in the housing market.

16.   The reasons behind this sudden change are difficult to discern.

17.   Such a sudden change will unsettle her.

18.   Troops disoriented by the sudden change in battle plans.