．____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.
| A．It | B．As | C．What | D．That |
How long can you ________ your breath underwater?
| A．hold | B．take | C．keep | D．save |
By the side of the Bird’s Nest , completed in 2008.
| A．there standing the Water Cube | B．stands the Water Cube |
| C．does the Water Cube stand | D．the Water Cube stands |
___________ certain that his invertion will lead to the development of production.
| A．That’s | B．This is | C．It’s | D．What’s |
How wonderful! The _____is made of _________.
| A．house , glass | B．house, glasses | C．houses, glass | D．houses, glasses |
The car was completely _____ and the driver seriously injured.
| A．broken off | B．taken off | C．written off | D．picked up |