Question

Sullen is to moody as monotonous is to what?* attractive drab repetitious varied

Answer 1

Since 'sullen' and 'moody' mean almost the same, we should find a word that has a similar meaning to 'monotonous'. The word that has the closes meaning to it is 'repetitious', meaning 'tedious, boring, dull'. 

Answer 2

I used this from my text book I hope it helps!