He is an hour late by now.He         last night.
#87971
A
must stay up
B
should stay up
C
must have stayed up
D
should have stayed up
推荐题目
 It’s too bad that I failed in the math exam. If only I ______ hard at it!
#87203
A
worked
B
had worked
C
has worked
D
would work
The boss requested that he _____ there to work.
#87332
A
was sent
B
be sent
C
should send
D
would be sent
Helen _______ it if she doesn’t want to. 
#87742
A
doesn’t need do
B
need not to do
C
needs not to do
D
need not do