Multiple choice softskills communication The letters A, E, I, O and U ___________ the group of letters known as vowels. comprise of compose of compose consist Reveal answer Fill a bubble to check yourself C Correct answer Explanation The vowels (parts) compose the group (whole). 'Compose' is transitive - the parts compose the whole. Neither 'comprise of' nor 'compose of' are valid - 'comprise' doesn't take 'of' and 'compose' is transitive without preposition.