My best friend is an angel. Metaphor

Here are the answers:

1. My best friend is an angel. Metaphor
2. My teacher exclaimed, "The world is your stage." Metaphor
3. The sun is like an exquisite marble in the sky. Simile
4. Jeffrey is very knowledgeable. He is a walking dictionary. Metaphor
5. My mother intends to keep us as busy as bees. Simile
6. The classroom is a zoo. Metaphor
7. My brother is as stubborn as a mule. Simile
8. Education is your key to the future. Metaphor
9. The water sparkled like thousands of tiny diamonds. Simile
10. My baby sister Ruth is a cute little teddy bear. Metaphor