Whenwalkingdownthestreet,IcameacrossDavid,whomI

問題詳情：

 When walking down the street, I came across David, whom I __________ for years.

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

【回答】

C

知識點：動詞時態與語態

題型：選擇題