11.   At peak aurora season, fanatics such as Hans Nielsen, a fiftysomething Dane, keep vigil in this place every night for weeks on end.

12.   At peak season, American Airlines cleared seats for our delayed departure and upgraded us to first class without charge.

13.   Bacon supplies in storage unexpectedly shrank during April, government figures showed, pointing to rising prices at the beginning of the peak demand season.

14.   Because HRN brings the hotels steady business during the year, the hotels return the favor in the form of available rooms during peak seasons.

15.   A price rise in August would come at the end of the peak gasoline season, a time when prices normally start to decline.

16.   A. Summer is the peak tourist season in Iceland, and prices tend to be high.

17.   Ad rates rise during the peak campaign season as a torrent of political ads heats up the competition for air time.

18.   All allow some flexibility, depending on peak business seasons, as to how it can be taken.

19.   Bus transportation is available and advised in peak season.

20.   But business travelers are still standing by for turbulence during the peak travel season ahead.