Complete the sentences. One variant is extra.

Please, buy a carton of ... . I’d like some coffee.
They need a ... of pineapples for their fruit salad.
A ... of crisps is my favourite snack.
Could you buy a loaf of ... ? Let’s make some sandwiches for breakfast.
A kilo of pears costs one ... .
Three lemons cost eighty-five ... .
Have you got ... lemonade?
Are there ... eggs on the plate?
We haven’t got ... sugar.
They haven’t got ... strawberries.
My mum cooked ... meat yesterday.
May I come in? ...
May I open the window? ...
May I ask Ben to come to my birthday party? ...
May I watch TV now? ...
May I have some more chocolate cake, please? ...