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

It may be an __________________ task to see all the masterpieces kept in the museum  — it will take a person about eleven years to look at each of the museum’s exhibits for just one minute.