问题补充：
--- Oh, dear. I forgot the air tickets.
--- You something.
A. have left
B. are always leaving
C. are leaving
D. always left
答案：
A. have left
(答案→)B. are always leaving
C. are leaving
D. always left
解析：进行时态与always, all the time等连用，表示习惯性行为，且带有浓厚的感情色彩。此处可理解为“你总是丢三落四的”。
