Can the birds swim? A. Yes, they can. B. No, they aren’t. C. Yes, they can’t
--- Did you see Mr. Green?--- Sorry?---______________________?
---Whose coats is this?--- Is it a black one?---Yes, it is.---________________.-- Here you are.---Thank you very much.
--- Help yourself to some fish.---__________________.
---_______.--- I caught a cold.
---________________--- Yes, speaking.