——Alvin, are you coming with us?
—— I’d love to, but something unexpected _______.
A．has come up B．was coming up C．had come up D．would come up
Walmart, which is one of the largest American supermarket chains, _______ some of its store open 24 hours on Mondays through Saturdays.
A．keep B．keeps C．have kept D．had kept
He is a very careful man, but he ________ make mistakes which seem ridiculous
A．can B．must C．may D．will
One of our rules is that every student _______ wear school uniform while at school.
A．might B．could C．shall D．will
He _______ the best person you had been expecting for the job, but who else _______?
A．may not be; could be
B．couldn’t be; might be
C．might not have been; could have been
D．mustn’t be; must have been
His expression suggested that he _______ ill, so the teacher suggested that he _______ sent to hospital at once.
A．was; must be B．is; should be C．be; be D．was; be
