1. Lewis Carroll's book (singular possessive noun)
2. The knife's edge (singular possessive noun)
3. The book's cover (singular possessive noun)
4. Mayor Sanita's speech (singular possessive noun)
5. The flowers' aroma (plural possessive noun)
6. The children's bicycle (plural possessive noun)
7. The sirens' roar (plural possessive noun)
hope this helps
