Though __________， he still earned a lot of money to support his family.
| A．no employment | B．not employed |
| C．was not employed | D．he not employed |
——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 |