Mr. Lin _____ when I go to see him on Sundays.
| A．is always working | B．was always working |
| C．always worked | D．has always worked |
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 |