Question

select the one adjective. dont select any articles (a, an, or the). darell gaped in disbelief when he saw that there had been a last - minute change to the schedule, and he had missed the flight.

Explanation:

We need to identify the adjective in the sentence. An adjective describes a noun. In the sentence, "last - minute" is an adjective as it describes the noun "change". Articles like "a", "an", "the" are not to be selected, and other words like "Darell" (noun), "gaped" (verb), "disbelief" (noun), "he" (pronoun), "saw" (verb), "there" (adverb), "had been" (verb phrase), "change" (noun), "to" (preposition), "the" (article), "schedule" (noun), "and" (conjunction), "missed" (verb), "flight" (noun) are not adjectives. So the adjective is "last - minute".

Answer:

last - minute