【题目】I was surprised to find the snack shops around the school empty; the students everything!
A.had been buying B.had bought
C.have bought D.have been buying
在线课程【答案】B
【解析】
试题分析：考查时态辨析。根据句意是过去某一时间之前已经完成的事情，故采用过去完成时。句意：我惊讶地发现学校周围的零食店都已经空了；学生们买完了所有的东西。根据句意可以判断， 故选B。