用方框中所给单词的适当形式填空，使对话通顺、正确。每词仅用一次(每空一词)。

A: Can I  you?

B: Yes, please. I want a T-shirt.

A: What  do you want?

B: White.

A: How  this one?

B: It  very nice. How much is it?

A: $20.

B: OK, I'll  it.

A: Here you are.

B: Thank you.

A: You're welcome.