【题目】—Dear me! It’s you, Bob! I ______ to recognize you at first sight!
—Nor did I! Time has changed us a lot!
A. fail B. failed
C. have failed D. had failed
在线课程【答案】B
【解析】
试题分析： 考查动词的时态。句意：——哇塞(天哪)，是你吗，鲍勃！我第一眼没有认出你来。——我也是。岁月让我们改变了好多啊！根据语境可知刚才没有认出来，所以用一般过去时。