以下哪个短语不可以在文章中和in fact 同义替换?（）
A、undoubtedly
B、as a matter of the fact
C、actually
D、as we all know
【正确答案】：A
【题目解析】：考察单词短语: in fact事实上, 实际上. A选项undoubtedly无疑地; B选项as a matter of the fact事实上; C选项actually事实上, 实际上; D选项as we all know众所周知, 事实上. it is generally believed that 事实上, 众所周知. 故选A.