They peasants did what they____ the crops, but failed.
| A．could save | B．could saving | C．could to save | D．could saved |
The exam poster will beon Friday afternoon．
| A．put off | B．put down | C．put up | D．put away |
Hurry up! Flight 4406off at 18:40.
| A．takes | B．took | C．will be taken | D．has taken |
He liked to go to dances and parties, ______ he could have a good time just sitting and watching.
| A．where | B．when | C．which | D．why |
The Diaoyu islands have been part of China’s territory since ancient times, ______ as important fishing grounds of Taiwan.
| A．served | B．to serve | C．serving | D．having served |
—What’s that noise, John?
—Oh, don’t you know that the school library ?
| A．is rebuilt | B．is being rebuilt | C．was rebuilt | D．has been rebuilt |