It was __________ he took off his dark glasses __________ I realized he was a famous singer.
| A．until，that | B．not until，that | C．not until，when | D．when，then |
—The athletes won 51 gold medals in the 29th Olympic Games.
—We are all __________ their success in the Olympic Games.
| A．pride in | B．pride of |
| C．proud in | D．proud of |
The waste can be recycled into new products, which __________ will save natural resources.
| A．in turn | B．in return |
| C．in order | D．in time |
Tony __________ the deadline by two hours, but did not inform me __________, which made me angry.
| A．advanced; in advance | B．approached; ahead of time |
| C．put off; at time | D．delayed; in time |
There's a __________ in our office that when it's somebody's birthday, they bring in a cake for us all to share.
| A．tradition | B．balance |
| C．concern | D．relationship |
__________, the little girl could speak English so well.
| A．To our astonishment | B．To us surprise |
| C．To our astonishing | D．To our surprising |