19. Clerk: How may I help you?
Customer: I bought this lamp last week. It doesn’t work, and I’d like to return it.
Clerk: Oh, I’m sorry. Would you like to exchange it?
Customer: No, thank you. _______________
(A) I like its style.
(B) I’d like a refund.
(C) I want my receipt.
(D) I came back last week.
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