【题目】Just as I got to the school gate, I realised I ______ my bank in the cafe.
A.have left
B.had left
C.would leave
D.was leaving

【答案】B
【解析】我刚―到学校门口，就意识到我把书落在餐馆了，realized后省略that这里是一个宾语从句，从句时态与主句保持一致“落下”的动作发生在“意识到”之前，应该用过去完成时，故选B