6. I like Sara, but I don't know why she wears such _____ clothes. a strange b noisy c old-fashioned

The adjective that does NOT fit in sentence 6 is b noisy.

Explanation: The sentence discusses Sara's clothes. 'Strange' and 'old-fashioned' are adjectives that can describe clothing style. 'Noisy' is not a characteristic of clothes.

Answer: b noisy