Fill in the blank (13) with the most appropriate word.
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 D is correct as we are talking about the present.
The other options are wrong as no other tense other than simple past tense can be used.
The correct answer is D)wanted