Practicing Success
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series. r _ k n _ c _ _ h _ _ b c b t _ k _ b c b |
h b b s k n h c h c b s k n b n h b b s k n h n h b c q k n h n |
h b b s k n h n |
r / h k n / b c b / s / h k n / b c b / t / h k n / b c b h b b s k n h n |