Sure, here are the sentences completed with appropriate words:

1. Add **some** vinegar and 200ml of water into the bowl and mix well.
2. My brother usually has **some** cereal and some milk for breakfast.
3. She bought a grapefruit and **a** banana at the village market.
4. Mummy, can you give me **some** celery, please.
5. I have a recipe that calls for only **a clove of** garlic.
6. There is **some** bread, some egg, and some salad for dinner.