Question

A или An 1 apple 2 umbrella 3 flower 4 identity card 5 book 6 exercise 7 hamburger 8 sandwich 9 unit 10 fork

Answer 1

A:3,5,7,8,10
An:1,2,4,6,9

Answer 2

An apple
An umbrella
A flower
An identity card
A book
An exercise
A hamburger
A sandwich
An unit
A fork