Yesterday I met Sandy. We since middle school.
A. haven’t seen, finished
B. haven’t seen, finishing
C. hadn’t seen, finished
D. hadn’t seen, finishing
网友回答
A. haven’t seen, finished
B. haven’t seen, finishing
C. hadn’t seen, finished
(答案→)D. hadn’t seen, finishing
解析：过去完成时用来表示过去之前已发生或完成的动作或状态，动作或状态发生在过去的过去 其构成： had +过去分词。根据语境可知此句的含义是我昨天遇到了Sandy,自从中学毕业以后一直没有见过面,故用助动词had not+过去分词,又因since是介词，其后跟动词时只能跟动词的ing形式，故选D.