Why did they keep trying _________ they must have known it was hopeless?
| A．if | B．because | C．when | D．whether |
The Yellow river is the second ______ river in china.
| A．long | B．longer | C．longest | D．shortest |
So many great events _____ that it is bound to be a most special year in history.
| A．2008 saw | B．saw 2008 | C．did 2008 see | D．would 2008 see |
---Are you still working in Shanghai?
---No, I’m working in Hangzhou now. I ______ in Shanghai for three years.
| A．worked | B．have worked | C．had worked | D．was working |
The discussion ______ at tomorrow’s meeting is very important.
| A．to discuss | B．discussed | C．to be discussed | D．being discussed |
The teacher together with his students _____ running there now.
| A．was | B．were | C．are | D．is |