Let's complete the sentences with 'some' or 'any'. Here's the breakdown:
1. Mitsuko: I'm going to the supermarket to buy 1) **some** things. There's 2) **some** milk in the fridge and we haven't got 3) **any** coffee. Do you need anything?
2. Julie: Can you get 4) **some** biscuits, please?
3. Mitsuko: Yes, of course. Anything else?
4. Julie: Oh, and 5) **some** flour because I want to make 6) **some** cakes this afternoon and there isn't enough.
5. Mitsuko: Aren't there 7) **any** cakes in the fridge?
6. Julie: No. There aren't 8) **any** cakes in the fridge.
**Explanation:**
* We use 'some' in positive sentences to indicate an unspecified quantity or amount.
* We use 'any' in questions and negative sentences to inquire about or state the absence of something.