问题
选择题
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
答案
答案:A
题目分析: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。