guitar       piano         violin

I see two butterflies（蝴蝶）.

A. —How old are you?   —I'm nine years old.

B. So many books! Thank you.

C. I have two little dogs.

D. —How old is Janet?    —She's seven years old.

E. —How old is Peter?    —He's three years old.

F. This toy bear is for you, Tom.

G. I have four balls.

H. —How many crayons?    —There are four.

I. Look! I have five bananas.

J. —How old is your little brother?    —He is only one year old.