It was really noisy in the workshop. Not until ______ at the top of my voice ______ to look at me.
| A．did I shout; he turned | B．had I shouted; had he turned |
| C．did I shout; did he turn | D．had I shouted; he turns |
I have told you the truth. ________ I keep repeating it?
| A．Must | B．Can | C．May | D．Will |
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 |