1. Everyone smiled like sunflowers in full bloom;

2. Everyone smiled like pomegranates in August, grinning from ear to ear;

3. Everyone smiles like blooming cotton peaches;

4. Everyone smiles like cherry blossoms;

5. Everyone smiles like jasmine flowers in spring.

Metaphor is a commonly used rhetorical device. Using something B that is similar to thing A to describe or explain something A is one of the figures of speech in rhetoric. By using metaphorical rhetorical techniques, everyone's smiles are compared to blooming sunflowers, August pomegranates, cotton peaches, cherry blossoms, and spring jasmine, vividly showing everyone's happiness and hearty smiles.