#1 sara was always tasked with selecting birthday presents for her friends and family because everyone admired her impeccable taste.
impeccable (adj): perfect, flawless
#2 they moved to the united states many years ago, but their insular attitudes made it difficult for them to socialize.
insular (adj): isolated; separate
#3 the professor explained the semantic relationship between the two nouns used in the sentence.
semantic (adj): related to words or the meanings of words
happy to : )