Choose the correct option to fill in the blank with the appropriate modal in the following sentence:

If I were a cosmonaut, I _____ have taken you to the moon :

would

The correct answer is Option (2) → would

The sentence "If I were a cosmonaut, I _____ have taken you to the moon" is a hypothetical (unreal) conditional.

• It follows the second conditional structure:
  If + past tense, + would + base verb (to express an unreal situation in the present or future).

• "Would" is used in hypothetical situations to express what could happen if things were different.
•  "If I were a cosmonaut, I would have taken you to the moon." (Correct)