Mr. Smith, I should tell you this is the fifth time you me for my twin sister.
A. have mistaken
B. are mistaking
C. mistook
D. are mistaken
网友回答
(答案→)A. have mistaken
B. are mistaking
C. mistook
D. are mistaken
解析：句意：史密斯先生，我应该告诉你这是你第五次把我误认为是我的孪生妹妹。根据前面的this is the fifth time可知，后面用现在完成时。故选A。