Identify the common noun in each sentence.
- Sarah finally got her degree.
- Jennifer and her brother are going to Disneyland next month.
- I told Donald that I prefer vegetarian food.
- Harry went to the park with his friend, Keisha.
- This calendar covers January through December.
- Raj named his pet iguana the Jack Sparrow.
- North America and Asia are continents.
- This book was co-written by doctors Smith and Klein.
- I heard that my cousin is going to Singapore next month for his studies.