30. It was quite a few years the accused was declared innocent and set free.
| A．since | B．that | C．when | D．Before |
Criticized as online games are, they never fail to ______ a large number of teenagers．
| A．appeal to | B．object to | C．refer to | D．turn to |
---When shall we start the reconstruction of the historic building?
--- Not until our program ______ by the authority.
| A．will approve | B．will be approved |
| C．has approved | D．has been approved |
I have to reschedule the appointment with you since there is a ______ in my arrangement.
| A．contract | B．contrast | C．connection | D．conflict |
You will have to stay at home all day ______ you finish all your homework.
| A．if | B．unless | C．whether | D．because |
He works very hard in order to get himself ______ into a key university.
| A．accepted | B．received | C．announced | D．admitted |