Practicing Success
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series. ab_ _ _bca_ _acb_ _ _aac_ _ |
cbaabcabca aacbacabbc aabcabccab cabaabcabc |
aacbacabbc |
a b a a c b c / a b a a c b c / a b a a c b c a a c b a c a b b c |