Об­ра­зуй­те от слова SPECIAL од­но­ко­рен­ное слово так, чтобы оно грам­ма­ти­че­ски и лек­си­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

There are various excursions to the cathedral. The best idea is to go online to check the guides’ schedules as they __________________ in different aspects of the building’s history.