— I haven’t finished my task yet. — You shouldn’t have watched the film last night, or you

— I haven’t finished my task yet.
— You shouldn’t have watched the film last night, or you it by now.
A, need have finished B. may have finished
C. should have finished D. will have finished

解析：考查虚拟语气。“may+have+done”表示对发生过的事情的推测，意思是“可能已经”或“也许已经”，用于肯定句中。“need+have+done”表示本来需要做某事而没有做。“should+have+done”意思是“本来应该做某事，而实际没做。句意：我还没有完成我的任务。——昨晚你不应该看电影，否则到如今你可能已经完成了。故选B。

好好学习下