Attention, please！The plane to London_______ off at 9: 00.
| A．took | B．takes |
| C．was taking | D．has taken |
--- What’s wrong with your mobile phone? Every time I call, the only response is “Sorry, the number you dialed is out of service…”!
--- Really? Maybe it’s because my mobile isn’t______the signal well.
| A．picking out | B．picking up | C．giving out | D．giving away |
_________that developed countries want to limit the development of the developing countries in the climate conference in Copenhagen.
| A．It is no possibility | B．It is small wonder |
| C．There is no denying | D．There is no chance |
．—What happened to the young trees we planted last week?
—The trees ____ well, but I __________ them.
| A．might grow; hadn’t watered | B．needn’t have grown; didn’t water |
| C．would have grown; didn’t water | D．would grow; hadn’t watered |
After five years of preparation, Shanghai is presenting the world _______ many say is the greatest Special Olympics.
| A．when | B．what | C．where | D．which |
At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions ______ it was too late.
| A．when | B．after | C．until | D．before |