用a、some、any填空

There is （some ）milk in the sky. I want （a）lot of bread,please.
Do you want （any ）bread? No,I don't want （any）bread. I want （some）tea.
I want （some ）biscuits,too.

some 用于肯定句
any 用于否定句疑问句
a lot of 是固定搭配