Which line from the passage differs in intonation from the rest? His books are all jammed in the closet, Huh? You say it's mine? Oh, dear, Donald or Robert or Willie or-- A lizard named Ed is asleep in his bed,
"Oh, dear, Donald or
Robert or Willie..." is the only line from this list that differs in intonation since it expresses surprise about something, where the others are more inquisitive.