Fill in the blank with a or an

II. Fill in the blank with a or an.
1.
ice cream
2.
5.
6.
9.
10.
13.
17.
21.
25.
racket
glass
book
door
cupcake
sock
14.
18.
22.
table
frog
sandwich
tea pot
umbrella
onion
3.
7.
11.
15.
19.
23.
elephant
igloo
candle
sheep
ball
lamp
D. serious
4.
8.
12.
16.
20.
24.
hea
ca
sha
sh
T
C