Every day Mr. Crocodile had a big meal. After his meal, he opened his mouth to take a nice nap.

During this time, Miss Turtledove would take the opportunity to fly into Mr. Crocodile's mouth to search for food, and at the same time, to clean up Mr. Crocodile's teeth. Mr. Crocodile hated all kinds of animals, he thought that they are annoying. One day, Mr. Crocodile could not tolerate Miss Turtledove anymore, he roared, "Please don't disturb me while I am sleeping! Go away! And don't come back!" Miss Turtledove was terrified. She flew away immediately. She was Mr. Crocodile's dentist no more.

After Miss Turtledove left, Mr. Crocodile enjoyed the "peaceful" atmosphere very much. He kept eating and drinking every day. As time went by, Mr. Crocodile's teeth started to ache. He's got a teeth ache! So Mr. Crocodile was in a bad mood for a whole week. Coincidentally, Miss Turtledove flew across the river, she felt sympathetic for Mr. Crocodile, so she stopped near his mouth. She asked him to open it so that she could help relief his pain. After a whole afternoon of cleaning, Mr. Crocodile's teeth did not hurt anymore. He was thankful to Miss Turtledove and also ashamed of what he had done before. He apologized to Miss Turtledove at once and also said thank you. Since then, Mr. Crocodile and Miss Turtledove became good friends!