The work they got down to________again yesterday because of the bad weather.
| A．stopped |
| B．stop |
| C．stopping |
| D．be stopped |
—Why does Sara know so much about Angkor Wat?
—She _______ there,or she may have read about it.
| A．must have been |
| B．shouldn’t have been |
| C．may have been |
| D．can’t have been |
—Excuse me.Is this the right way to the Summer Palace?
—Sorry, I am not sure.But it _______ be.
| A．might | B．will |
| C．must | D．can |
You _______ be tired—you’ve only been working for an hour.
| A．must not | B．won’t |
| C．can’t | D．may not |
The engineers must have worked out the design by the end of last week，_______？
| A．mustn’t they | B．hadn’t they |
| C．haven’t they | D．didn’t they |
It rained a lot during their journey,so they _______ have had a good time.
| A．can’t | B．must |
| C．shouldn’t | D．might |