用适当的词语补全对话，每空一词。（共5小题，每小题1分，共5分）
Clerk: ____ I help you?
Mary:  Yes, please. I want a sweater.
Clerk: What ____ do you want?
Mary:  Blue.
Clerk: Here you are.
Mary:  How ____ is it?
Clerk: Nine dollars.
Mary:  I’ll _____ it. Thanks.
Clerk: You’re ____.