—How are you, Jack?
— , I'm rather sick．
A. In addition
B. As a matter of fact
C. On the other hand
D. On the contrary
网友回答
A. In addition
(答案→)B. As a matter of fact
C. On the other hand
D. On the contrary
解析：考查交际用语。A另外；B事实上；C另外一方面；D恰恰相反；句意：—Jack，你好吗？—实际上，我感觉很难受。根据句意说明B正确。