A: I don't eat meat
B:Do you eat fish?
A:Yes. And eggs.
B:I love fruit. I have an orange every day.
A: I have a banana at lunch.
B: Do you have a sundwich,too?
A:Yes. And a biscuit.
B:I don't like tea. Do you?
A:Yes, but I like sugar in it. What do you drink?
B:Oh, coffee, usually.
a, an - если можно чтото посчитать, например 1 банан, 2 банана.
ничего не ставим если нельзя посчитать, жидкость.