Because it depends whether it is a vowel or a consonant. For example 'a apple' is wrong. 'an apple' is correct. 'a book' is correct. 'an book' is wrong. The word that begins with a vowel like orange,...
The Christmas tree has long been a Christian symbol of everlasting life because of its evergreen nature. Germans first started decorating them with candy, apples, and garlands but they weren't...