Артикль a / an

This is ... orange.

We have ... picnic in the garden.

I have ... egg for lunch.

I haven`t got .. apple.

It is ... banana.

I have ... big cake for breakfast.

There ia ... fruit salad on the table.

I have .... strawberry yogurt for dinner.

There is ... apple juice for lunch.

There is .. red pear on the plate.

This is ... ice-cream.

I have ... cheesecake for lunch.