I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "In Eastern Catalan (except Majorcan), unstressed vowels reduce to three: /a e ɛ/ > [ə]; /o ɔ u/ > [u]; /i/ remains distinct. There are a few instances of unreduced [e], [o] in some words. Alguerese has lowered [ə] to [a]."? 

What letters in a word are difficult to hear when spoken due to being masked by louder syllables or letters?