If you are asked to 'alphabetise' a list of words, you have to put them into alphabetical order. Unfortunately, if some words begin with the same letter, then you will have to look at the second letter. If the second letter is the same, then you will have to look at the third letter and so on before you can decide which word comes first.
To make things a bit easier for you, here's the alphabet:
a b c d e f g h i j k l m n o p q r s t u v w x y z.
If you don't get full marks in this 11-plus English quiz, don't worry - just try again until you are sure you have alphabetising sorted!