Practicing Success
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series. X_U_B_O_Z_X_U_B |
O X Z U B O Z O Z X U B Z O O Z X B U O Z O Z X U B O Z |
O Z X U B O Z |
X O U Z B / X O U Z B / X O U Z B O Z X U B O Z |