Speaker A: Hello Mr. Brown. This is John Barretts secretary. Im calling to cancel his app
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Speaker A: Hello, Mr. Brown. This is John Barretts secretary. Im calling to cancel his appointment with you at ten today as he is not feeling well. Speaker B: ______
A．All right, but I will be very busy tomorrow.
B．I"m sorry to hear that. I think he"d better see a doctor.
C．Really？ That"s too bad. I hope he"s not seriously ill.
D．Thanks for calling. It"s quite all right We"ll arrange some other time to meet
请帮忙给出正确答案和分析，谢谢！