补全对话。
(B is at A’s home)
A：It’s very cold this morning. Would you like a cup of hot milk?
B：Sorry.      
A：With sugar?
B：      . I don’t want any sugar.
A：But I know you usually like tea with sugar.
B：Yes. But the doctor told me it’s bad for my health.
A：I see. Here’s some home cooked food.      
B：No, thanks. I had breakfast an hour ago.      
A：Help yourself to some fruit，then.
B：