Поставьте a/an/some 1.I want... Tea and... Sandwich
2.There is... Butter in the fridge
3.liz bought... Tomatoes and... Bottle of milk
4.there is... Cup of tea and... Cakes on the table
5.we hadpasta for dinner
6.I would like...apple and... Jelly

1. I want a tea and a sandwich.
Here, we use "a" before "tea" and "sandwich" because they are both countable nouns and we are referring to one of each.

2. There is some butter in the fridge.
Here, we use "some" before "butter" because "butter" is an uncountable noun.

3. Liz bought some tomatoes and a bottle of milk.
Here, we use "some" before "tomatoes" because "tomatoes" is an uncountable noun. We use "a" before "bottle of milk" because "bottle" is a countable noun.

4. There is a cup of tea and some cakes on the table.
Here, we use "a" before "cup of tea" because it refers to one cup. We use "some" before "cakes" because "cakes" is an uncountable noun.

5. We had pasta for dinner.
Here, we do not use "a/an/some" because "pasta" is an uncountable noun.

6. I would like an apple and some jelly.
Here, we use "an" before "apple" because "apple" is a countable noun. We use "some" before "jelly" because "jelly" is an uncountable noun.