Since it is midnight already,we ( )

问题描述:

Since it is midnight already,we ( )
A.have better left
B.ought to have left
C.should ask for a leave
D.might as well leave

D.might as well leave(as go on),might as well do as do 是搭配 :与其...(后者),不如...(前者)
根据句意:既然已经半夜,还是走吧(不要再继续干了).