补全下列各组对话，每空一词。

1.—_________ _________ help you?

   —I'm looking for a white shirt.

2.—_________ _________ do you want?

   —I want yellow.

3.—Do you like the green one?

   —No,_________ _________. I like red better.

4.—Is the black one Ok?

   —No, it's_________ _________ .I want a cheap one.

5.—_________ _________ is the sweater?

   —It's 50 dollars.

6.—I'll take it. Here's the money.

   —_________ _________ _________.