Whenwalkingdownthestreet,IcameacrossDavid,whoI

问题详情：

 When walking down the street, I came across David, who I _____ for years.

  A. didn’t see         B. haven’t seen     C. hadn’t seen     D. wouldn’t see

【回答】

C

考点：考查动词时态。

知识点：虚拟语气与情态动词

题型：选择题