18. Karl: I’m going downtown. Can I get you anything while I’m out?
Ruby: Do you think you might stop by a post office?
Karl: _______________
Ruby: Could you help me mail this package?
Karl: Sure.
(A) Oh, dear. They do fit.
(B) I could. What would you like?
(C) How much do I owe you?
(D) Don’t bother if it’s inconvenient.
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