问题
选择题
Look! Xiao Wang is too sleepy to work . He ____ up watching TV .
A．mustn''t have stayed
B．shouldn''t have stayed
C．mustn''t stay
D．ought not to stay
答案
B。
shouldn''t have stayed 表示过去本不应该做某事，而事实却做了。含埋怨、责备之意。