Did you lock the door?—No,I ____,but I forgot.A.should B.must have C.must D.should have 既然说了no,那就说明不是了,可选项里又没有,不可能是BC,A不

问题描述:

Did you lock the door?—No,I ____,but I forgot.A.should B.must have C.must D.should have 既然说了no,那就说明不是了,可选项里又没有,不可能是BC,A不行?

D 你锁门了吗?不,我本该锁门的,但是我忘了.
should have表示对过去发生的事情的虚拟