谁的牙齿？

Whose Tooth?

Sally's dad found a very big tooth at work.

He took the tooth home. “Who has teeth this big?” asked Sally. “Let's go to the zoo to find out," said Dad.

Sally and Dad first went to see the elephants. “It's smaller than an elephant tusk,” said Sally.

“It's too big for a crocodile,”said Dad.

“It’s different from the hippo's teeth,”said Sally.