She knows so much about England. She ________ there before. 
| A．must be | B．must have been | C．must live | D．must have lived in |
The news that he won the game sounds.
| A．encouraged | B．encouraging | C．encourage | D．to encourage |
----I’ll tell Mary about her new job tomorrow.
---- You_____ her last week.
| A．ought to tell | B．would have told | C．must tell | D．should have told |
This depends uponhe is interested in doing this kind of work.
| A．if | B．whether | C．that | D．what |
I was about to leave the officean unexpected visitors came.
| A．while | B．as | C．when | D．before |
The place _______ the bridge is supposed to be built should be________ the cross-river traffic is the heaviest.
| A．which; where | B．at which; which | C．at which; where | D．which; in which |