Here are the completed singular and plural forms:
| Singular | Plural |
|----------|-------------|
| ear | ears |
| class | classes |
| party | parties |
| knife | knives |
| child | children |
| house | houses |
| tomato | tomatoes |
| boy | boys |
| glass | glasses |
| mouse | mice |
| bike | bikes |
| dish | dishes |
| hero | heroes |
| body | bodies |
| woman | women |