Question

complete the sentence.
bernie knew that he had heard the word auspicious before and vaguely understood the meaning, but he could neither think of a synonym nor ______________.
use the word in a sentence
could he use the word in a sentence

Explanation:

The structure "neither... nor" requires parallelism. "Think of a synonym" is a verb - phrase. "Use the word in a sentence" is also a verb - phrase, maintaining parallelism. "Could he use..." is not parallel as it has an inverted subject - verb structure which breaks the parallelism with "think of a synonym".

Answer:

use the word in a sentence