Fill in the blanks with the most appropriate words.
"_____ you _____ to Russia."
"Yes, I _____ ."
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 the subject is you and present perfect tense uses the main verb in the third form.
The other options are wrong as be is used as an ordinary verb and indicates the use of auxiliary verb used in the present perfect construction.
The correct answer is D)have/been/have