I spent the weekend finishing off my November Listening Bootcamp, and this was one of the last videos - it's a Section 4 Listening.
IELTS chooses very specific words for gapfills. The word 'comfortable' is one of the top 100 most mispronounced words, so if you learn to pronounce it accurately, you're more likely to hear it correctly in the test.
Members Academy - go to Day 27 in the Listening Course.