Fill in the blank with the most appropriate word.
The weekend was boring.
I _____ anything.
A verb is used to express an occurrence, action, or state. It is the grammatical centre of the predicate in a sentence.
An auxiliary verb is a verb which gives is used in the formation of tenses, moods, tones, etc.
Option C is correct as the subject is I and the given sentence is in the simple past tense. Do is used both as as auxiliary verb and main (ordinary) verb (didn't do)
The other options are wrong as the main verb is not given. Anything suggests the use of not.
The correct answer is C)didn't do.