题目内容：
Mary: Hello, John. How are you feeling now? Somebody said you had been sick.John.________ A．Hello, Mary. They must have had me confused with my brother, George. He has been sick all week. I have never felt better in my life.
B．Hello, Mary. Who' s sick? How can I be sick? I' m as strong as a horse. They must have gone mad.
C．Hello, Mary. How are you?
D．Hello, Mary. I' m quite happy. My wife has fallen ill. And, how about you?
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