Directions: There are ten short incomplete dialogues between two speakers, each followed by four choices marked A, B, C and D. Choose the answer that appropriately suits the conversational context and best completes the dialogue. Mark your answer on the ANSWER SHEET by drawing with a pencil a short bar across the corresponding letter in the brackets. A: I didn’t know this was a one-way street to that avenue, officer. B:______
A．That’s all right. B．You are sure. C．How dare you say that D．Sorry, but that’s no excus