Our government has taken some measures to overcome the lack of electricity, but it may take some time _____ we have enough power．
| A．since | B．after | C．unless | D．before |
I'd appreciateif you would turn the radio down．
| A．that | B．it | C．this | D．you |
There were no tickets __________ for Friday’s performance.
| A．useful | B．available | C．helpful | D．reasonable |
Life in the oceans ranges from the tiniest plankton ______ up to giants like sharks and whales.
| A．in the way | B．all the way | C．by the way | D．on the way |
The 2008 Olympics has already ______China's great economic progress,
| A．seen | B．achieved | C．reached | D．strengthened |
In the end, she _____________for the future.
| A．told to us her plan | B．unfolded to us her plan |
| C．reminded to us her plan | D．explained us her plan |