M: The bus to the seaside left 5 minutes ago. how often does it come? ,F: Every 20 minutes.
(A) M: I didn’t hear you. Please could you tell me again? (B) M: Oh, I've been waiting 20 minutes for the bus to downtown. (C) M: I've been stuck in a taxi for 15 minutes and it will take me another 15 minutes to get to the seaside. (D) M: That means I have to wait for 15 minutes.
D