Which of the following is NOT one of the context clues?

Perseveranceisakindofqualityandthatis_______ittakestodoanythingwell.

Parents, teachers in schools and communicators in or using the mass media are all capable of ________ our potential interests.

OxfordAdvancedLearnersDictionary’,3rdEdition(1980),isamongthebest-knownBritish______dictionaries.

Ithasbeenyears________Ireturnedhome.