Articles 'A' and 'An'

..... book

• a

• an

..... duster

• a

• an

..... rubber

• a

• an

.... umbrella

• a

• an

.... sharpener

• a

• an

.... basket

• a

• an

.... egg

• a

• an

.... ruler

• a

• an

.... igloo

• a

• an

.... bag

• a

• an