Select the most appropriate option to fill in the blank.

The experience of having climbed to the Mt. Everest changes you _________.

completely

The most appropriate option to fill in the blank is completely.

The word completely means wholly or entirely. In this case, the sentence is saying that the experience of having climbed to the Mt. Everest changes you completely. This means that the experience changes you in a fundamental way.

The other options are not correct.

• Rarely means not often. It does not make sense in this context because the experience of climbing Mt. Everest is a life-changing event.
• Regularly means in a normal or customary way. It does not make sense in this context because the experience of climbing Mt. Everest is not a normal or customary event.
• Frequently means often. It does not make sense in this context because the experience of climbing Mt. Everest is not an event that happens often.